Unnamed: 0 int64 0 3.43k | guid stringlengths 36 36 | url stringlengths 44 113 | correct_answer stringlengths 1 105 | annotation stringlengths 33 449 | target_var_json stringlengths 48 152 | answer_json stringlengths 38 146 | condition_json stringlengths 32 823 | question_title stringlengths 68 312 | question_details stringclasses 188
values | answer stringlengths 1 105 | answer_description stringlengths 153 8.47k | answer_text stringlengths 146 8.65k | full_articfle stringlengths 5.44k 19.2k | question stringlengths 21 265 | question_description stringclasses 187
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | a9a338de-6ddd-11ea-9ba4-ccda262736ce | https://socratic.org/questions/how-many-elements-in-total-are-joined-together-to-form-magnesium-chloride | 2 | start physical_unit 2 2 number none qc_end substance 10 11 qc_end end | [{"type":"physical unit","value":"Number [OF] elements"}] | [{"type":"physical unit","value":"2"}] | [{"type":"substance name","value":"Magnesium chloride"}] | <h1 class="questionTitle" itemprop="name">How many elements, in total, are joined together to form magnesium chloride? </h1> | null | 2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#MgCl_2#</mathjax> is the molecular formula.</p>
<p>So here you can see, that the compound is made by forming 1 <mathjax>#Mg#</mathjax> and 2 <mathjax>#Cl#</mathjax> atoms. </p>
<p>There is an ionic bond e... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#MgCl_2#</mathjax> is the molecular formula of magnesium chloride.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#MgCl... | <article>
<h1 class="questionTitle" itemprop="name">How many elements, in total, are joined together to form magnesium chloride? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcr... | How many elements, in total, are joined together to form magnesium chloride? | null |
1 | a9e03bac-6ddd-11ea-9161-ccda262736ce | https://socratic.org/questions/what-is-the-empirical-formula-for-a-compound-that-is-36-1-ca-and-63-9-ci | CaCl2 | start chemical_formula qc_end end | [{"type":"other","value":"Chemical Formula [OF] the compound [IN] empirical"}] | [{"type":"chemical equation","value":"CaCl2"}] | [{"type":"physical unit","value":"Percent [OF] Ca in the compound [=] \\pu{36.1%}"},{"type":"physical unit","value":"Percent [OF] Cl in the compound [=] \\pu{63.9%}"}] | <h1 class="questionTitle" itemprop="name">What is the empirical formula for a compound that is 36.1% Ca and 63.9% CI? </h1> | null | CaCl2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>As with all these problems, we assume a <mathjax>#100*"g"#</mathjax> of compound, and divide through by the ATOMIC masses of each component element:</p>
<p><mathjax>#"Moles of calcium"#</mathjax> <mathjax>#=(36.1*"... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"CaCl"_2#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>As with all these problems, we assume a <mathjax>#100*"g"#</... | <article>
<h1 class="questionTitle" itemprop="name">What is the empirical formula for a compound that is 36.1% Ca and 63.9% CI? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcru... | What is the empirical formula for a compound that is 36.1% Ca and 63.9% CI? | null |
2 | a9db3310-6ddd-11ea-8201-ccda262736ce | https://socratic.org/questions/what-is-the-ph-of-2-34-10-5-naoh-solution | 9.37 | start physical_unit 9 10 ph none qc_end physical_unit 9 10 5 8 molarity qc_end end | [{"type":"physical unit","value":"pH [OF] NaOH solution"}] | [{"type":"physical unit","value":"9.37"}] | [{"type":"physical unit","value":"Molarity [OF] NaOH solution [=] \\pu{2.34 × 10^(-5) M}"}] | <h1 class="questionTitle" itemprop="name">What is the pH of #2.34 * 10^-5# #NaOH# solution?</h1> | null | 9.37 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>And <mathjax>#[HO^-]2.34xx10^-5*mol*L^-1#</mathjax>...</p>
<p><mathjax>#pOH=-log_10[HO^-]=-log_10(2.34xx10^-5)=4.63#</mathjax></p>
<p><mathjax>#pH=14-pH=13-4.63=9.37.#</mathjax>...the solution is slightly basic...<... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>Well, we know that <mathjax>#pH+pOH=14#</mathjax> in water...</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>And <mathjax>#[HO^-]2.34xx10... | <article>
<h1 class="questionTitle" itemprop="name">What is the pH of #2.34 * 10^-5# #NaOH# solution?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemis... | What is the pH of #2.34 * 10^-5# #NaOH# solution? | null |
3 | ab4505b9-6ddd-11ea-a6d9-ccda262736ce | https://socratic.org/questions/57ff1aa5b72cff6976a735db | HO- + H+ -> H2O(aq) | start chemical_equation qc_end substance 10 11 qc_end substance 13 14 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the net ionic equation"}] | [{"type":"chemical equation","value":"HO- + H+ -> H2O(aq)"}] | [{"type":"substance name","value":"Hydroiodic acid"},{"type":"substance name","value":"Potassium hydroxide"}] | <h1 class="questionTitle" itemprop="name">What is the net ionic equation for the reaction between hydroiodic acid, and potassium hydroxide?</h1> | null | HO- + H+ -> H2O(aq) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>And the complete equation:</p>
<p><mathjax>#NaOH(aq) + HI(aq) rarr NaI(aq) +H_2O(l)#</mathjax></p>
<p>So this is an acid base <a href="https://socratic.org/chemistry/reactions-in-solution/neutralization">neutraliza... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>This is simply: <mathjax>#HO^(-) + H^(+) rarr H_2O(aq)#</mathjax> OR <mathjax>#HO^(-) + H_3O^(+) rarr 2H_2O(aq)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4... | <article>
<h1 class="questionTitle" itemprop="name">What is the net ionic equation for the reaction between hydroiodic acid, and potassium hydroxide?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
... | What is the net ionic equation for the reaction between hydroiodic acid, and potassium hydroxide? | null |
4 | aab42890-6ddd-11ea-813b-ccda262736ce | https://socratic.org/questions/what-is-the-ph-of-a-6-49-10-3-m-koh-solution | 11.81 | start physical_unit 10 11 ph none qc_end physical_unit 10 11 6 9 molarity qc_end end | [{"type":"physical unit","value":"pH [OF] KOH solution"}] | [{"type":"physical unit","value":"11.81"}] | [{"type":"physical unit","value":"Molarity [OF] KOH solution [=] \\pu{6.49 × 10^(-3) M}"}] | <h1 class="questionTitle" itemprop="name">What is the pH of a #6.49 * 10^-3# #M# #KOH# solution?</h1> | null | 11.81 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>It is a fact that in aqueous solution under standard conditions, </p>
<p><mathjax>#14=pH+pOH#</mathjax></p>
<p>So we can directly calculate <mathjax>#pOH#</mathjax>, and then approach <mathjax>#pH#</mathjax>.</p>
<... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#pH~=11.8#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>It is a fact that in aqueous solution under standard conditi... | <article>
<h1 class="questionTitle" itemprop="name">What is the pH of a #6.49 * 10^-3# #M# #KOH# solution?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">C... | What is the pH of a #6.49 * 10^-3# #M# #KOH# solution? | null |
5 | a8ca630b-6ddd-11ea-99c8-ccda262736ce | https://socratic.org/questions/how-do-you-balance-mg-h-3po-4-mg-3-po-4-2-h-2 | 3 Mg + 2 H3PO4 -> Mg3(PO4)2 + 3 H2 | start chemical_equation qc_end chemical_equation 4 10 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"3 Mg + 2 H3PO4 -> Mg3(PO4)2 + 3 H2"}] | [{"type":"chemical equation","value":"Mg + H3PO4 -> Mg3(PO4)2 + H2"}] | <h1 class="questionTitle" itemprop="name">How do you balance #Mg + H_3PO_4 -> Mg_3(PO_4)_2 + H_2#?</h1> | null | 3 Mg + 2 H3PO4 -> Mg3(PO4)2 + 3 H2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/chemical-reactions/balancing-chemical-equations">Balancing chemical equations</a> always involves a bit of algebra, and maybe some trial-and-error. The objective is always t... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#2H_3PO_4 -> Mg_3(PO_4)_2#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/c... | <article>
<h1 class="questionTitle" itemprop="name">How do you balance #Mg + H_3PO_4 -> Mg_3(PO_4)_2 + H_2#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="tit... | How do you balance #Mg + H_3PO_4 -> Mg_3(PO_4)_2 + H_2#? | null |
6 | a8c11406-6ddd-11ea-ad59-ccda262736ce | https://socratic.org/questions/5909351111ef6b3e353427b8 | 0.14 mol | start physical_unit 19 20 mole mol qc_end physical_unit 3 4 1 2 mole qc_end substance 11 12 qc_end substance 14 15 qc_end end | [{"type":"physical unit","value":"Mole [OF] magnesium nitrate [IN] mol"}] | [{"type":"physical unit","value":"0.14 mol"}] | [{"type":"physical unit","value":"Mole [OF] silver chloride [=] \\pu{0.276 mol}"},{"type":"substance name","value":"Silver nitrate"},{"type":"substance name","value":"Magnesium chloride"}] | <h1 class="questionTitle" itemprop="name">If #0.276*mol# silver chloride was collected from a reaction between silver nitrate and magnesium chloride, how many equiv magnesium nitrate were used?</h1> | null | 0.14 mol | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>And how do we know? Well, if we write the stoichiometric equation we have illustrated the <a href="https://socratic.org/chemistry/stoichiometry/stoichiometry">stoichiometry</a>:</p>
<p><mathjax>#2AgNO_3(aq) + MgCl... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>One equiv of silver ion, <mathjax>#Ag^+#</mathjax>, and half an equiv of <mathjax>#MgCl_2(aq)#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div clas... | <article>
<h1 class="questionTitle" itemprop="name">If #0.276*mol# silver chloride was collected from a reaction between silver nitrate and magnesium chloride, how many equiv magnesium nitrate were used?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.... | If #0.276*mol# silver chloride was collected from a reaction between silver nitrate and magnesium chloride, how many equiv magnesium nitrate were used? | null |
7 | a8bf8d77-6ddd-11ea-b338-ccda262736ce | https://socratic.org/questions/how-many-moles-of-ammonium-nitrate-are-in-335-ml-of-0-425m-nh-4no-3 | 0.14 moles | start physical_unit 13 13 mole mol qc_end physical_unit 13 13 8 9 volume qc_end physical_unit 13 13 11 12 molarity qc_end end | [{"type":"physical unit","value":"Mole [OF] NH4NO3 [IN] moles"}] | [{"type":"physical unit","value":"0.14 moles"}] | [{"type":"physical unit","value":"Volume [OF] NH4NO3 [=] \\pu{335 mL}"},{"type":"physical unit","value":"Molarity [OF] NH4NO3 [=] \\pu{0.425 M}"}] | <h1 class="questionTitle" itemprop="name">How many moles of ammonium nitrate are in 335 mL of 0.425M #NH_4NO_3#?</h1> | null | 0.14 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You could get fancy and say that this <a href="http://socratic.org/chemistry/solutions-and-their-behavior/solutions">solutions</a> contains <strong>zero moles</strong> of <em>ammonium nitrate</em>, but that would n... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"0.142 moles"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You could get fancy and say that this <a href="http://s... | <article>
<h1 class="questionTitle" itemprop="name">How many moles of ammonium nitrate are in 335 mL of 0.425M #NH_4NO_3#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" it... | How many moles of ammonium nitrate are in 335 mL of 0.425M #NH_4NO_3#? | null |
8 | a97f704c-6ddd-11ea-a601-ccda262736ce | https://socratic.org/questions/a-mixture-of-n2-o2-and-co2-has-a-total-pressure-of-740-torr-in-this-mixture-the- | 220 torr | start physical_unit 6 6 partial_pressure torr qc_end physical_unit 1 1 12 13 total_pressure qc_end physical_unit 4 4 32 33 partial_pressure qc_end physical_unit 3 3 23 24 partial_pressure qc_end end | [{"type":"physical unit","value":"Partial pressure [OF] CO2 [IN] torr"}] | [{"type":"physical unit","value":"220 torr"}] | [{"type":"physical unit","value":"Total pressure [OF] mixture [=] \\pu{740 torr}"},{"type":"physical unit","value":"Partial pressure [OF] O2 [=] \\pu{400 torr}"},{"type":"physical unit","value":"Partial pressure [OF] N2 [=] \\pu{120 torr}"}] | <h1 class="questionTitle" itemprop="name">A mixture of #"N"_2#, #"O"_2#. and #"CO"_2# has a total pressure of #"740 torr"# In this mixture, the partial pressure of #"N"_2# is #"120 torr"# and the partial pressure of #"O"_2# is #"400 torr"#. What is the partial pressure of #"CO"_2# ?
</h1> | null | 220 torr | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From Dalton's Law of <a href="https://socratic.org/chemistry/the-behavior-of-gases/partial-pressure">Partial Pressures</a>, the total pressure of a mixture of gases is the sum of the partial pressures of each gas.<... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"220 torr"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From Dalton's Law of <a href="https://socratic.org/chemist... | <article>
<h1 class="questionTitle" itemprop="name">A mixture of #"N"_2#, #"O"_2#. and #"CO"_2# has a total pressure of #"740 torr"# In this mixture, the partial pressure of #"N"_2# is #"120 torr"# and the partial pressure of #"O"_2# is #"400 torr"#. What is the partial pressure of #"CO"_2# ?
</h1>
<div class="clearfi... | A mixture of #"N"_2#, #"O"_2#. and #"CO"_2# has a total pressure of #"740 torr"# In this mixture, the partial pressure of #"N"_2# is #"120 torr"# and the partial pressure of #"O"_2# is #"400 torr"#. What is the partial pressure of #"CO"_2# ?
| null |
9 | abfb77aa-6ddd-11ea-96ac-ccda262736ce | https://socratic.org/questions/what-is-the-volume-of-4-5-gr-of-co-2 | 2.3 L | start physical_unit 8 8 volume ml qc_end physical_unit 8 8 5 6 mass qc_end end | [{"type":"physical unit","value":"Volume [OF] CO2 [IN] L"}] | [{"type":"physical unit","value":"2.3 L"}] | [{"type":"physical unit","value":"Mass [OF] CO2 [=] \\pu{4.5 g}"}] | <h1 class="questionTitle" itemprop="name">What is the volume of 4.5 g of #"CO_2"#?</h1> | null | 2.3 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>At STP, <mathjax>#"273.15 K"#</mathjax> and <mathjax>#"1 atm"#</mathjax>, the <a href="http://socratic.org/chemistry/measurement-in-chemistry/density">density</a> of carbon dioxide is <mathjax>#"0.001977 g/cm"^3"#<... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The volume of <mathjax>#"4.5 g CO"_2"#</mathjax> is <mathjax>#"2300 cm"^3"#</mathjax> at STP.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"... | <article>
<h1 class="questionTitle" itemprop="name">What is the volume of 4.5 g of #"CO_2"#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry</span... | What is the volume of 4.5 g of #"CO_2"#? | null |
10 | a90e51e2-6ddd-11ea-a0a4-ccda262736ce | https://socratic.org/questions/a-student-observes-that-36-76-ml-of-1-013-m-naoh-are-required-to-neutralize-a-12 | 6.09 M | start physical_unit 20 21 concentration mol/l qc_end physical_unit 18 18 4 5 volume qc_end physical_unit 9 9 7 8 concentration qc_end physical_unit 18 18 15 16 volume qc_end end | [{"type":"physical unit","value":"Concentration [OF] sulfuric acid sample [IN] M"}] | [{"type":"physical unit","value":"6.09 M"}] | [{"type":"physical unit","value":"Volume [OF] NaOH solution [=] \\pu{36.76 mL}"},{"type":"physical unit","value":"Concentration [OF] NaOH solution [=] \\pu{1.013 M}"},{"type":"physical unit","value":"Volume [OF] sulfuric acid aqueous solution [=] \\pu{12.23 mL}"}] | <h1 class="questionTitle" itemprop="name">A student observes that 36.76 mL of 1.013 M NaOH are required to neutralize
a 12.23 mL aqueous solution of sulfuric acid. What is the concentration of sulfuric acid in the initial sample?</h1> | null | 6.09 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong>Balanced equation</strong></p>
<p><mathjax>#"H"_2"SO"_4("aq") + "2NaOH(aq)"#</mathjax><mathjax>#rarr#</mathjax><mathjax>#"Na"_2"SO"_4("aq") + "2H"_2"O("l")"#</mathjax></p>
<p><strong>Titration formula:</str... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The concentration of sulfuric acid in the initial sample is <mathjax>#"6.090 M"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><... | <article>
<h1 class="questionTitle" itemprop="name">A student observes that 36.76 mL of 1.013 M NaOH are required to neutralize
a 12.23 mL aqueous solution of sulfuric acid. What is the concentration of sulfuric acid in the initial sample?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope=... | A student observes that 36.76 mL of 1.013 M NaOH are required to neutralize
a 12.23 mL aqueous solution of sulfuric acid. What is the concentration of sulfuric acid in the initial sample? | null |
11 | a87f6d68-6ddd-11ea-8ade-ccda262736ce | https://socratic.org/questions/find-the-mass-of-urea-ch4n2o-needed-to-prepare-49-0-g-of-a-solution-in-water-in- | 1.05 × 10^1 g | start physical_unit 5 5 mass g qc_end physical_unit 13 15 9 10 mass qc_end physical_unit 5 5 24 26 mole_fraction qc_end end | [{"type":"physical unit","value":"Mass [OF] CO(NH2)2 [IN] g"}] | [{"type":"physical unit","value":"1.05 × 10^1 g"}] | [{"type":"physical unit","value":"Mass [OF] the solution in water [=] \\pu{49.0 g}"},{"type":"physical unit","value":"Mole fraction [OF] CO(NH2)2 [=] \\pu{7.58 × 10^(−2)}"}] | <h1 class="questionTitle" itemprop="name">Find the mass of urea, #"CO"("NH"_2)_2#, needed to prepare #"49.0 g"# of a solution in water in which the mole fraction of urea is #7.58 * 10^(−2)#?</h1> | null | 1.05 × 10^1 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <strong>mole fraction</strong> of urea is defined as the ratio between the number of moles of urea and the <strong>total number of moles</strong> present in the solution.</p>
<p>In your case, <a href="https://s... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#1.05 * 10^1#</mathjax> <mathjax>#"g"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <strong>mole fraction</stron... | <article>
<h1 class="questionTitle" itemprop="name">Find the mass of urea, #"CO"("NH"_2)_2#, needed to prepare #"49.0 g"# of a solution in water in which the mole fraction of urea is #7.58 * 10^(−2)#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org... | Find the mass of urea, #"CO"("NH"_2)_2#, needed to prepare #"49.0 g"# of a solution in water in which the mole fraction of urea is #7.58 * 10^(−2)#? | null |
12 | a9b919a3-6ddd-11ea-ae01-ccda262736ce | https://socratic.org/questions/what-is-the-chemical-formula-for-blue-vitriol-whose-systematic-name-is-copper-ii | CuSO4.5H2O | start chemical_formula qc_end substance 12 13 qc_end end | [{"type":"other","value":"Chemical Formula [OF] blue vitriol [IN] default"}] | [{"type":"chemical equation","value":"CuSO4.5H2O"}] | [{"type":"substance name","value":"Copper(II) sulfate"}] | <h1 class="questionTitle" itemprop="name">What is the chemical formula for blue vitriol, whose systematic name is copper(II) sulfate? </h1> | null | CuSO4.5H2O | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Actually the compound ,blue vitriol is a hydrated crystalline substance ,so its formula is written as <mathjax>#CuSO_4. 5H_2O#</mathjax> <br/>
and its chemically known as <mathjax>#color(blue)("copper(II)sulphate... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#CuSO_4. 5H_2O#</mathjax> </p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Actually the compound ,blue vitriol is a hydrated cry... | <article>
<h1 class="questionTitle" itemprop="name">What is the chemical formula for blue vitriol, whose systematic name is copper(II) sulfate? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span... | What is the chemical formula for blue vitriol, whose systematic name is copper(II) sulfate? | null |
13 | a94394a8-6ddd-11ea-9b79-ccda262736ce | https://socratic.org/questions/2nh-3-aq-h-2so-4-aq-nh-4-2so-4-aq-how-many-grams-of-ammonium-sulfate-can-be-prod | 7962 grams | start physical_unit 10 11 mass g qc_end chemical_equation 0 5 qc_end physical_unit 19 20 16 17 mole qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Mass [OF] ammonium sulfate [IN] grams"}] | [{"type":"physical unit","value":"7962 grams"}] | [{"type":"chemical equation","value":"2 NH3(aq) + H2SO4(aq) -> (NH4)2SO4(aq)"},{"type":"physical unit","value":"Mole [OF] sulfuric acid [=] \\pu{60.0 mol}"},{"type":"other","value":"Excess of ammonia."}] | <h1 class="questionTitle" itemprop="name">#2NH_3(aq) + H_2SO_4(aq) -> (NH_4)_2SO_4(aq)#. How many grams of ammonium sulfate can be produced if 60.0 mol of sulfuric acid react with an excess of ammonia? </h1> | null | 7962 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>What you are trying to find is called the theoretical yield, or how much of a particular product can we expect to form from a given amount of a reactant, assuming that the given reactant reacts completely.</p>
<p>O... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>Assuming that there is an excess in ammonia, there are 7962 grams of of ammonium sulfate that can be produced for every 60 moles of sulfuric acid that reacts. More on that below.</p></div>
</div>
</div>
<div class="ans... | <article>
<h1 class="questionTitle" itemprop="name">#2NH_3(aq) + H_2SO_4(aq) -> (NH_4)_2SO_4(aq)#. How many grams of ammonium sulfate can be produced if 60.0 mol of sulfuric acid react with an excess of ammonia? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data... | #2NH_3(aq) + H_2SO_4(aq) -> (NH_4)_2SO_4(aq)#. How many grams of ammonium sulfate can be produced if 60.0 mol of sulfuric acid react with an excess of ammonia? | null |
14 | aa868fb0-6ddd-11ea-84bc-ccda262736ce | https://socratic.org/questions/what-is-the-empirical-formula-of-vanillin | C8H8O3 | start chemical_formula qc_end substance 6 6 qc_end end | [{"type":"other","value":"Chemical Formula [OF] Vanillin [IN] empirical"}] | [{"type":"chemical equation","value":"C8H8O3"}] | [{"type":"substance name","value":"Vanillin"}] | <h1 class="questionTitle" itemprop="name">What is the empirical formula of Vanillin?</h1> | null | C8H8O3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The empirical formula of Vanillin is the same as its molecular formula: <mathjax>#C_8H_8O_3#</mathjax>.</p>
<p>Empirical formula by definition is the simplest formula of a compound. It is determined by dividing all... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The same as its molecular formula: <mathjax>#C_8H_8O_3#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The empirical formula o... | <article>
<h1 class="questionTitle" itemprop="name">What is the empirical formula of Vanillin?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry</sp... | What is the empirical formula of Vanillin? | null |
15 | a93cde06-6ddd-11ea-8501-ccda262736ce | https://socratic.org/questions/the-concentration-of-aqueous-methanol-is-10-of-it-s-mass-what-is-the-molar-fract | 0.05 | start physical_unit 4 4 molar_ratio none qc_end physical_unit 3 4 6 6 concentration qc_end end | [{"type":"physical unit","value":"Molar fraction [OF] methanol"}] | [{"type":"physical unit","value":"0.05"}] | [{"type":"physical unit","value":"Concentration [OF] aqueous methanol [=] \\pu{10%}"}] | <h1 class="questionTitle" itemprop="name">The concentration of aqueous methanol is 10% of its mass. What is the molar fraction of methanol?</h1> | null | 0.05 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The problem wants you to find the <strong>mole fraction</strong> of methanol, <mathjax>#"CH"_3"OH"#</mathjax>, by using the fact that its solution has a <strong><a href="https://socratic.org/chemistry/solutions-and... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#0.05#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The problem wants you to find the <strong>mole fraction</strong>... | <article>
<h1 class="questionTitle" itemprop="name">The concentration of aqueous methanol is 10% of its mass. What is the molar fraction of methanol?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
... | The concentration of aqueous methanol is 10% of its mass. What is the molar fraction of methanol? | null |
16 | aa2012ec-6ddd-11ea-a513-ccda262736ce | https://socratic.org/questions/how-would-you-balance-the-following-equation-fe-o2-fe2o3-1 | 4 Fe + 3 O2 -> 2 Fe2O3 | start chemical_equation qc_end chemical_equation 7 11 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"4 Fe + 3 O2 -> 2 Fe2O3"}] | [{"type":"chemical equation","value":"Fe + O2 -> Fe2O3"}] | <h1 class="questionTitle" itemprop="name">How would you balance the following equation: Fe+O2 --> Fe2O3? </h1> | null | 4 Fe + 3 O2 -> 2 Fe2O3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Step 1: Tally the number of atoms based on subscript.</p>
<p><mathjax>#Fe#</mathjax> + <mathjax>#O_2#</mathjax> <mathjax>#rarr#</mathjax> <mathjax>#Fe_2O_3#</mathjax> (unbalanced)</p>
<p>left side: Fe = 1; O = 2<br... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#4Fe#</mathjax> + <mathjax>#3O_2#</mathjax> <mathjax>#rarr#</mathjax> <mathjax>#2Fe_2O_3#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div c... | <article>
<h1 class="questionTitle" itemprop="name">How would you balance the following equation: Fe+O2 --> Fe2O3? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itempr... | How would you balance the following equation: Fe+O2 --> Fe2O3? | null |
17 | a9f6698a-6ddd-11ea-9ac8-ccda262736ce | https://socratic.org/questions/what-is-the-the-volume-occupied-by-2-34-g-of-carbon-dioxide-gas-at-stp | 1.18 L | start physical_unit 10 12 volume l qc_end physical_unit 10 12 7 8 mass qc_end c_other STP qc_end end | [{"type":"physical unit","value":"Volume [OF] carbon dioxide gas [IN] L"}] | [{"type":"physical unit","value":"1.18 L"}] | [{"type":"physical unit","value":"Mass [OF] carbon dioxide gas [=] \\pu{2.34 g}"},{"type":"other","value":"STP"}] | <h1 class="questionTitle" itemprop="name">What is the the volume occupied by 2.34 g of carbon dioxide gas at STP?</h1> | null | 1.18 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>In order to solve this problem we would use the <a href="https://socratic.org/chemistry/the-behavior-of-gases/ideal-gas-law">Ideal Gas Law</a> formula <mathjax>#PV=nRT#</mathjax></p>
<p><mathjax>#P =#</mathjax> Pre... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#V = 1.18 L#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>In order to solve this problem we would use the <a href="h... | <article>
<h1 class="questionTitle" itemprop="name">What is the the volume occupied by 2.34 g of carbon dioxide gas at STP?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" i... | What is the the volume occupied by 2.34 g of carbon dioxide gas at STP? | null |
18 | a9a31340-6ddd-11ea-afed-ccda262736ce | https://socratic.org/questions/how-do-you-write-a-equation-for-aluminum-copper-ll-sulfate-copper-aluminum-sulfa | 2 Al(s) + 3 CuSO4(aq) -> Al2(SO4)3(aq) + 3 Cu(s) | start chemical_equation qc_end chemical_equation 7 16 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"2 Al(s) + 3 CuSO4(aq) -> Al2(SO4)3(aq) + 3 Cu(s)"}] | [{"type":"chemical equation","value":"Aluminum + copper (ll) sulfate -> copper + aluminum sulfate"}] | <h1 class="questionTitle" itemprop="name">How do you write a equation for "Aluminum + copper (ll) sulfate -> copper + aluminum sulfate"?</h1> | null | 2 Al(s) + 3 CuSO4(aq) -> Al2(SO4)3(aq) + 3 Cu(s) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The reaction would be the following :</p>
<p><mathjax>#2Al(s)+3CuSO_4(aq)->Al_2(SO_4)_3(aq)+3Cu(s)#</mathjax></p>
<p>This is an oxidation-reduction reaction were electrons are transferred from Aluminum <mathjax>... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#2Al(s)+3CuSO_4(aq)->Al_2(SO_4)_3(aq)+3Cu(s)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The reaction would be ... | <article>
<h1 class="questionTitle" itemprop="name">How do you write a equation for "Aluminum + copper (ll) sulfate -> copper + aluminum sulfate"?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">... | How do you write a equation for "Aluminum + copper (ll) sulfate -> copper + aluminum sulfate"? | null |
19 | a8df89a9-6ddd-11ea-acf5-ccda262736ce | https://socratic.org/questions/how-do-you-balance-zn-oh-2-ch-3cooh-zn-ch-3coo-2-h-2o | Zn(OH)2 + 2 CH3COOH -> ZN(CH3COO)2 + 2 H2O | start chemical_equation qc_end chemical_equation 4 10 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"Zn(OH)2 + 2 CH3COOH -> ZN(CH3COO)2 + 2 H2O"}] | [{"type":"chemical equation","value":"Zn(OH)2 + CH3COOH -> ZN(CH3COO)2 + H2O"}] | <h1 class="questionTitle" itemprop="name">How do you balance #Zn(OH)_2 + CH_3COOH -> Zn(CH_3COO)_2 + H_2O#?</h1> | null | Zn(OH)2 + 2 CH3COOH -> ZN(CH3COO)2 + 2 H2O | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>One way to do it is to think of it as a proton donation (acid) reaction and a proton acceptance (base) reaction:</p>
<p>Acid:</p>
<p><mathjax>#"CH"_3"COOH" rarr "CH"_3"COO"^{-} + "H"^+#</mathjax></p>
<p>Base:</p>
<... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>Use the proton balance method given below to obtain:</p>
<p><mathjax>#2"CH"_3"COOH" + "Zn"("OH")_2 rarr "Zn"("CH"_3"COO")_2 + 2"H"_2"O"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answe... | <article>
<h1 class="questionTitle" itemprop="name">How do you balance #Zn(OH)_2 + CH_3COOH -> Zn(CH_3COO)_2 + H_2O#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" item... | How do you balance #Zn(OH)_2 + CH_3COOH -> Zn(CH_3COO)_2 + H_2O#? | null |
20 | a903f2e4-6ddd-11ea-8e8d-ccda262736ce | https://socratic.org/questions/a-balloon-has-a-volume-of-253-2-l-at-356-k-the-volume-of-the-balloon-is-decrease | 232.55 K | start physical_unit 14 15 temperature k qc_end physical_unit 14 15 6 7 volume qc_end physical_unit 14 15 9 10 temperature qc_end physical_unit 14 15 19 20 volume qc_end end | [{"type":"physical unit","value":"Temperature2 [OF] the balloon [IN] K"}] | [{"type":"physical unit","value":"232.55 K"}] | [{"type":"physical unit","value":"Volume1 [OF] the balloon [=] \\pu{253.2 L}"},{"type":"physical unit","value":"Temperature1 [OF] the balloon [=] \\pu{356 K}"},{"type":"physical unit","value":"Volume2 [OF] the balloon [=] \\pu{165.4 L}"}] | <h1 class="questionTitle" itemprop="name">A balloon has a volume of 253.2 L at 356 K. The volume of the balloon is decreased to 165.4 L. What is the new temperature?</h1> | null | 232.55 K | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Before doing any calculation, try to predict what you expect the new temperature to be <em>relative</em> to the initial temperature. </p>
<p>In your case, <em>number of moles</em> of gas and <em>pressure</em> are <... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"233 K"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Before doing any calculation, try to predict what you expect ... | <article>
<h1 class="questionTitle" itemprop="name">A balloon has a volume of 253.2 L at 356 K. The volume of the balloon is decreased to 165.4 L. What is the new temperature?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/c... | A balloon has a volume of 253.2 L at 356 K. The volume of the balloon is decreased to 165.4 L. What is the new temperature? | null |
21 | a8616c0c-6ddd-11ea-9209-ccda262736ce | https://socratic.org/questions/how-much-energy-is-required-to-raise-the-temperature-of-3-g-of-silver-from-15-c- | 3.53 J | start physical_unit 13 13 energy j qc_end physical_unit 13 13 15 16 temperature qc_end physical_unit 13 13 18 19 temperature qc_end physical_unit 13 13 10 11 mass qc_end end | [{"type":"physical unit","value":"Required energy [OF] silver [IN] J"}] | [{"type":"physical unit","value":"3.53 J"}] | [{"type":"physical unit","value":"Temperature1 [OF] silver [=] \\pu{15 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] silver [=] \\pu{20 ℃}"},{"type":"physical unit","value":"Mass [OF] silver [=] \\pu{3 g}"}] | <h1 class="questionTitle" itemprop="name">How much energy is required to raise the temperature of 3 g of silver from 15°C to 20°C? </h1> | null | 3.53 J | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <a href="https://socratic.org/chemistry/thermochemistry/specific-heat">specific heat</a> of silver is <mathjax>#s=0.235kJkg^-1K^-1#</mathjax></p>
<p>The mass is <mathjax>#m=0.003kg#</mathjax></p>
<p><mathjax>#D... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The energy is <mathjax>#=3.525J#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <a href="https://socratic.org/chemistry/the... | <article>
<h1 class="questionTitle" itemprop="name">How much energy is required to raise the temperature of 3 g of silver from 15°C to 20°C? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span cl... | How much energy is required to raise the temperature of 3 g of silver from 15°C to 20°C? | null |
22 | ab089734-6ddd-11ea-8fab-ccda262736ce | https://socratic.org/questions/57e6d379b72cff057fce3624 | C10H12NO | start chemical_formula qc_end substance 15 15 qc_end end | [{"type":"other","value":"Chemical Formula [OF] the organic compound [IN] empirical"}] | [{"type":"chemical equation","value":"C10H12NO"}] | [{"type":"physical unit","value":"Percentage [OF] C in organic compound [=] \\pu{74.0%}"},{"type":"physical unit","value":"Percentage [OF] H in organic compound [=] \\pu{7.4%}"},{"type":"physical unit","value":"Percentage [OF] N in organic compound [=] \\pu{8.6%}"},{"type":"substance name","value":"Oxygen"}] | <h1 class="questionTitle" itemprop="name">Combustion data of an organic compound yielded #74.0%, C;# #7.4%, H;# #8.6%, N;# and the balance oxygen. What is the empirical formula?</h1> | null | C10H12NO | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>As with all problems of this type, we assume a <mathjax>#100*g#</mathjax> mass of compound, and we determine the molar composition with respect to each element:</p>
<p>And thus:</p>
<p><mathjax>#"Moles of carbon"#<... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#C_10H_12NO#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>As with all problems of this type, we assume a <mathjax>#1... | <article>
<h1 class="questionTitle" itemprop="name">Combustion data of an organic compound yielded #74.0%, C;# #7.4%, H;# #8.6%, N;# and the balance oxygen. What is the empirical formula?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb"... | Combustion data of an organic compound yielded #74.0%, C;# #7.4%, H;# #8.6%, N;# and the balance oxygen. What is the empirical formula? | null |
23 | a9922389-6ddd-11ea-9682-ccda262736ce | https://socratic.org/questions/analysis-of-a-compound-shows-that-it-contains-7-0-g-nitrogen-and-16-0-g-oxygen-w | NO2 | start chemical_formula qc_end physical_unit 10 10 8 9 mass qc_end physical_unit 14 14 12 13 mass qc_end end | [{"type":"other","value":"Chemical Formula [OF] the compound [IN] empirical"}] | [{"type":"chemical equation","value":"NO2"}] | [{"type":"physical unit","value":"Mass [OF] nitrogen [=] \\pu{7.0 g}"},{"type":"physical unit","value":"Mass [OF] oxygen [=] \\pu{16.0 g}"}] | <h1 class="questionTitle" itemprop="name">Analysis of a compound shows that it contains 7.0 g nitrogen and 16.0 g oxygen. What is its empirical formula? </h1> | null | NO2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The empirical formula is the simplest whole number that defines constituent atoms in a species. </p>
<p>Using the given masses, and the atomic masses of each constituent, we define an empirical formula this way:</... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#NO_2#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The empirical formula is the simplest whole number that defines ... | <article>
<h1 class="questionTitle" itemprop="name">Analysis of a compound shows that it contains 7.0 g nitrogen and 16.0 g oxygen. What is its empirical formula? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" it... | Analysis of a compound shows that it contains 7.0 g nitrogen and 16.0 g oxygen. What is its empirical formula? | null |
24 | a9d6509c-6ddd-11ea-b361-ccda262736ce | https://socratic.org/questions/how-would-you-balance-the-following-equation-na2co3-bacl2-nacl-baco3 | Na2CO3 + BaCl2 -> 2 NaCl + BaCO3 | start chemical_equation qc_end chemical_equation 7 13 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"Na2CO3 + BaCl2 -> 2 NaCl + BaCO3"}] | [{"type":"chemical equation","value":"Na2CO3 + BaCl2 -> NaCl + BaCO3"}] | <h1 class="questionTitle" itemprop="name">How would you balance the following equation:
Na2CO3 + BaCl2 --> NaCl + BaCO3?</h1> | null | Na2CO3 + BaCl2 -> 2 NaCl + BaCO3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>It is important to notice that the <mathjax>#CO_3^(2-)#</mathjax> is a polyatomic ion, known as the carbonate ion. When balancing equations with <a href="http://socratic.org/chemistry/ionic-bonds-and-formulas/poly... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#Na_2CO_3+BaCl_2->2NaCl+BaCO_3#</mathjax> </p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>It is important to notice that the ... | <article>
<h1 class="questionTitle" itemprop="name">How would you balance the following equation:
Na2CO3 + BaCl2 --> NaCl + BaCO3?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="bre... | How would you balance the following equation:
Na2CO3 + BaCl2 --> NaCl + BaCO3? | null |
25 | aab4ec2c-6ddd-11ea-bac5-ccda262736ce | https://socratic.org/questions/a-sample-of-neon-has-a-volume-of-75-8-at-stp-how-many-moles-are-present | 3.38 moles | start physical_unit 1 3 mole mol qc_end physical_unit 1 3 8 9 volume qc_end c_other STP qc_end end | [{"type":"physical unit","value":"Mole [OF] neon sample [IN] moles"}] | [{"type":"physical unit","value":"3.38 moles"}] | [{"type":"physical unit","value":"Volume [OF] neon sample [=] \\pu{75.8 L}"},{"type":"other","value":"STP"}] | <h1 class="questionTitle" itemprop="name">A sample of neon has a volume of 75.8 at STP. How many moles are present?</h1> | null | 3.38 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong>I am going to assume that you mean 75.8 L since there are no units associated with the volume you provided.</strong></p>
<p>Because we are at standard temperature and pressure and are given only one set of ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>3.38 moles are present</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong>I am going to assume that you mean 75.8 L since there are n... | <article>
<h1 class="questionTitle" itemprop="name">A sample of neon has a volume of 75.8 at STP. How many moles are present?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb... | A sample of neon has a volume of 75.8 at STP. How many moles are present? | null |
26 | aa588338-6ddd-11ea-9bb5-ccda262736ce | https://socratic.org/questions/a-gas-expands-from-35-ml-to-70ml-if-the-temperature-was-at-22-celsius-what-will- | 317 celsius | start physical_unit 1 1 temperature °c qc_end physical_unit 1 1 14 15 temperature qc_end physical_unit 1 1 4 5 volume qc_end physical_unit 1 1 7 8 volume qc_end end | [{"type":"physical unit","value":"Temperature2 [OF] the gas [IN] celsius"}] | [{"type":"physical unit","value":"317 celsius"}] | [{"type":"physical unit","value":"Temperature1 [OF] the gas [=] \\pu{22 celsius}"},{"type":"physical unit","value":"Volume1 [OF] the gas [=] \\pu{35 ml}"},{"type":"physical unit","value":"Volume2 [OF] the gas [=] \\pu{70 ml}"}] | <h1 class="questionTitle" itemprop="name">A gas expands from 35 ml to 70ml. if the temperature was at 22 Celsius, what will the final temperature be? </h1> | null | 317 celsius | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This is explained by <a href="https://socratic.org/chemistry/the-behavior-of-gases/charles-law">Charles' Law</a>. The volume of a gas is directly proportional to the Kelvin temperature of the gas. In order to doubl... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The final temperature would be 317°C</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This is explained by <a href="https://socratic.org/ch... | <article>
<h1 class="questionTitle" itemprop="name">A gas expands from 35 ml to 70ml. if the temperature was at 22 Celsius, what will the final temperature be? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemp... | A gas expands from 35 ml to 70ml. if the temperature was at 22 Celsius, what will the final temperature be? | null |
27 | ac4cbd0a-6ddd-11ea-8f4c-ccda262736ce | https://socratic.org/questions/a-quantity-of-n-2-gas-originally-held-at-4-75-am-in-a-1-00l-container-at-26-c-is | 0.47 atm | start physical_unit 3 4 pressure atm qc_end physical_unit 3 4 8 9 pressure qc_end physical_unit 3 4 12 13 volume qc_end physical_unit 3 4 16 17 temperature qc_end physical_unit 3 4 22 23 volume qc_end physical_unit 3 4 26 27 temperature qc_end end | [{"type":"physical unit","value":"Pressure2 [OF] N2 gas [IN] atm"}] | [{"type":"physical unit","value":"0.47 atm"}] | [{"type":"physical unit","value":"Pressure1 [OF] N2 gas [=] \\pu{4.75 atm}"},{"type":"physical unit","value":"Volume1 [OF] N2 gas [=] \\pu{1.00 L}"},{"type":"physical unit","value":"Temperature1 [OF] N2 gas [=] \\pu{26 ℃}"},{"type":"physical unit","value":"Volume2 [OF] N2 gas [=] \\pu{10.0 L}"},{"type":"physical unit",... | <h1 class="questionTitle" itemprop="name">A quantity of #N_2# gas originally held at 4.75 am in a 1.00L container at 26°C is transferred to a 10.0 L container at 20°C. What is the total pressure in the new container?</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>Also, a quantity of <mathjax>#O_2#</mathjax> gas originally at 5.25 atm and 26°C in a 5.00 L container is transferred to this same container. </p></div>
</h2>
</div>
</div> | 0.47 atm | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Notice that the <em>volume</em> and the <em>temperature</em> of the gas change when going from the first container to the second container, but that the <em>number of moles</em> of gas remains <strong>constant</str... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"0.47 atm"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Notice that the <em>volume</em> and the <em>temperature</e... | <article>
<h1 class="questionTitle" itemprop="name">A quantity of #N_2# gas originally held at 4.75 am in a 1.00L container at 26°C is transferred to a 10.0 L container at 20°C. What is the total pressure in the new container?</h1>
<div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class=... | A quantity of #N_2# gas originally held at 4.75 am in a 1.00L container at 26°C is transferred to a 10.0 L container at 20°C. What is the total pressure in the new container? |
Also, a quantity of #O_2# gas originally at 5.25 atm and 26°C in a 5.00 L container is transferred to this same container.
|
28 | ab2605b8-6ddd-11ea-8617-ccda262736ce | https://socratic.org/questions/what-mass-is-a-sample-of-oxygen-gas-that-contains-avogadro-s-number-of-atoms | 16.00 g | start physical_unit 4 7 mass g qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Mass [OF] oxygen gas sample [IN] g"}] | [{"type":"physical unit","value":"16.00 g"}] | [{"type":"other","value":"Sample of oxygen gas that contains Avogadro's number of atoms."}] | <h1 class="questionTitle" itemprop="name">What mass is a sample of oxygen gas that contains Avogadro's number of atoms?</h1> | null | 16.00 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Most of the elemental gases, certainly the gases with any chemistry are BINUCLEAR... We speak of <mathjax>#"dinitrogen"#</mathjax>, <mathjax>#"dioxygen"#</mathjax>, <mathjax>#"dihalogen"#</mathjax>...</p>
<p>And s... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"A 16 g mass..."#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Most of the elemental gases, certainly the gases wit... | <article>
<h1 class="questionTitle" itemprop="name">What mass is a sample of oxygen gas that contains Avogadro's number of atoms?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcr... | What mass is a sample of oxygen gas that contains Avogadro's number of atoms? | null |
29 | ac2fcb66-6ddd-11ea-bcfe-ccda262736ce | https://socratic.org/questions/given-that-the-molar-mass-of-nacl-58-44-g-mol-what-is-the-molarity-of-a-solution | 3.00 M | start physical_unit 6 6 molarity mol/l qc_end physical_unit 6 6 7 8 molar_mass qc_end physical_unit 6 6 18 19 mass qc_end physical_unit 15 15 23 24 volume qc_end end | [{"type":"physical unit","value":"Molarity [OF] NaCl solution [IN] M"}] | [{"type":"physical unit","value":"3.00 M"}] | [{"type":"physical unit","value":"Molar mass [OF] NaCl [=] \\pu{58.44 g/mol}"},{"type":"physical unit","value":"Mass [OF] NaCl [=] \\pu{87.75 g }"},{"type":"physical unit","value":"Volume [OF] NaCl solution [=] \\pu{500 mL}"}] | <h1 class="questionTitle" itemprop="name">Given that the molar mass of NaCl 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution?</h1> | null | 3.00 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong><a href="https://socratic.org/chemistry/solutions-and-their-behavior/molarity">Molarity</a></strong> is a measure of how many <em>moles</em> of <a href="https://socratic.org/chemistry/solutions-and-their-be... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"3.00 mol L"^(-1)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong><a href="https://socratic.org/chemistry/sol... | <article>
<h1 class="questionTitle" itemprop="name">Given that the molar mass of NaCl 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">... | Given that the molar mass of NaCl 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution? | null |
30 | ac4640d4-6ddd-11ea-ae73-ccda262736ce | https://socratic.org/questions/given-the-balanced-equation-lioh-kcl-licl-koh-what-is-the-theoretical-yield-of-l | 35.4 g | start physical_unit 17 18 theoretical_yield g qc_end chemical_equation 4 10 qc_end physical_unit 28 29 25 26 mass qc_end end | [{"type":"physical unit","value":"Theoretical yield [OF] lithium chloride [IN] g"}] | [{"type":"physical unit","value":"35.4 g"}] | [{"type":"chemical equation","value":"LiOH + KCl -> LiCl + KOH"},{"type":"physical unit","value":"Mass [OF] lithium hydroxide [=] \\pu{20.0 grams}"}] | <h1 class="questionTitle" itemprop="name">Given the balanced equation, #LiOH + KCl -> LiCl + KOH#, what is the theoretical yield of lithium chloride if you start this reaction with 20.0 grams of lithium hydroxide?</h1> | null | 35.4 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The five basic steps to solve a theoretical yield problem are:</p>
<ol>
<li>Write the balanced equation for the reaction between <mathjax>#"LiOH"#</mathjax> and <mathjax>#"KCl"#</mathjax>.... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The theoretical yield is <mathjax>#"35.4 g LiCl"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The... | <article>
<h1 class="questionTitle" itemprop="name">Given the balanced equation, #LiOH + KCl -> LiCl + KOH#, what is the theoretical yield of lithium chloride if you start this reaction with 20.0 grams of lithium hydroxide?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="... | Given the balanced equation, #LiOH + KCl -> LiCl + KOH#, what is the theoretical yield of lithium chloride if you start this reaction with 20.0 grams of lithium hydroxide? | null |
31 | acde2e29-6ddd-11ea-9092-ccda262736ce | https://socratic.org/questions/58cab7ce11ef6b67966920c2 | 3.01 × 10^23 | start physical_unit 3 4 number none qc_end physical_unit 13 14 9 10 mass qc_end end | [{"type":"physical unit","value":"Number [OF] magnesium ATOMS"}] | [{"type":"physical unit","value":"3.01 × 10^23"}] | [{"type":"physical unit","value":"Mass [OF] the metal [=] \\pu{12 g}"}] | <h1 class="questionTitle" itemprop="name">What number of magnesium ATOMS are contained in a #12*g# mass of the metal?</h1> | null | 3.01 × 10^23 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Number of atoms of Mg"#</mathjax> <mathjax>#-=#</mathjax> <mathjax>#"Mass of metal"/"Molar mass of metal"xxN_A#</mathjax>, </p>
<p>where <mathjax>#N_A-="Avogadro's number"=6.022xx10^23*mol^-1#</mathjax><... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"Number of atoms......= "3.011xx10^23#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Number of atoms of M... | <article>
<h1 class="questionTitle" itemprop="name">What number of magnesium ATOMS are contained in a #12*g# mass of the metal?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrum... | What number of magnesium ATOMS are contained in a #12*g# mass of the metal? | null |
32 | ac056fe2-6ddd-11ea-a8ed-ccda262736ce | https://socratic.org/questions/58d3be23b72cff5c2be2b467 | 70.73 L | start physical_unit 11 12 volume l qc_end physical_unit 11 12 7 8 mass qc_end physical_unit 11 12 14 15 temperature qc_end physical_unit 11 12 24 25 pressure qc_end end | [{"type":"physical unit","value":"Volume [OF] carbon dioxide [IN] L"}] | [{"type":"physical unit","value":"70.73 L"}] | [{"type":"physical unit","value":"Mass [OF] carbon dioxide [=] \\pu{74.3 g}"},{"type":"physical unit","value":"Temperature [OF] carbon dioxide [=] \\pu{294 K}"},{"type":"physical unit","value":"Pressure [OF] carbon dioxide [=] \\pu{439 mmHg}"}] | <h1 class="questionTitle" itemprop="name">What is the volume expressed by a #74.3*g# mass of carbon dioxide at #294.9*K# enclosed in a piston at a pressure of #439*"mm Hg"#?</h1> | null | 70.73 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The key to this question is to express the pressure, which is given in <mathjax>#"mm Hg"#</mathjax>, to atmospheres. We know (or should know) that <mathjax>#1*atm#</mathjax> will support a column of mercury that i... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#V=(nRT)/P~=70*L#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The key to this question is to express the pressure, ... | <article>
<h1 class="questionTitle" itemprop="name">What is the volume expressed by a #74.3*g# mass of carbon dioxide at #294.9*K# enclosed in a piston at a pressure of #439*"mm Hg"#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a... | What is the volume expressed by a #74.3*g# mass of carbon dioxide at #294.9*K# enclosed in a piston at a pressure of #439*"mm Hg"#? | null |
33 | a8e4e0db-6ddd-11ea-9851-ccda262736ce | https://socratic.org/questions/what-is-the-percent-composition-by-mass-of-oxygen-in-magnesium-oxide | 39.70% | start physical_unit 8 11 mass_percent none qc_end substance 10 11 qc_end end | [{"type":"physical unit","value":"Percent composition by mass [OF] oxygen in magnesium oxide"}] | [{"type":"physical unit","value":"39.70%"}] | [{"type":"substance name","value":"Magnesium oxide"}] | <h1 class="questionTitle" itemprop="name"> What is the percent composition by mass of oxygen in magnesium oxide?</h1> | null | 39.70% | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Percentage oxygen composition in magnesium oxide "=#</mathjax></p>
<p><mathjax>#"Mass of oxygen"/"Mass of oxygen + mass of magnesium"xx100%#</mathjax></p>
<p><mathjax>#=#</mathjax> <mathjax>#(15.999*canc... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"Percentage oxygen composition in magnesium oxide"~=40%#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"P... | <article>
<h1 class="questionTitle" itemprop="name"> What is the percent composition by mass of oxygen in magnesium oxide?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" it... | What is the percent composition by mass of oxygen in magnesium oxide? | null |
34 | acfb2ab7-6ddd-11ea-923a-ccda262736ce | https://socratic.org/questions/a-gas-cylinder-with-a-volume-of-3-00-dm-3-contains-8-00-moles-of-oxygen-gas-at-a | 11 atm | start physical_unit 13 14 pressure atm qc_end physical_unit 13 14 7 8 volume qc_end physical_unit 13 14 10 11 mole qc_end physical_unit 13 14 19 20 temperature qc_end end | [{"type":"physical unit","value":"Pressure [OF] oxygen gas [IN] atm"}] | [{"type":"physical unit","value":"11 atm"}] | [{"type":"physical unit","value":"Volume [OF] oxygen gas [=] \\pu{3.00 dm^3}"},{"type":"physical unit","value":"Mole [OF] oxygen gas [=] \\pu{8.00 moles}"},{"type":"physical unit","value":"Temperature [OF] oxygen gas [=] \\pu{50.0 K}"}] | <h1 class="questionTitle" itemprop="name">A gas cylinder with a volume of 3.00 #dm^3# contains 8.00 moles of oxygen gas at a temperature of 50.0 K. What is the pressure inside the cylinder?</h1> | null | 11 atm | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From the <a href="https://socratic.org/chemistry/the-behavior-of-gases/ideal-gas-law">Ideal Gas Law</a>: <mathjax>#P=(nRT)/V#</mathjax> <mathjax>#=#</mathjax> <mathjax>#(8.00*cancel(mol)xx0.0821*cancelL*atm*cancel(... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#P~=11*atm#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From the <a href="https://socratic.org/chemistry/the-behavi... | <article>
<h1 class="questionTitle" itemprop="name">A gas cylinder with a volume of 3.00 #dm^3# contains 8.00 moles of oxygen gas at a temperature of 50.0 K. What is the pressure inside the cylinder?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/... | A gas cylinder with a volume of 3.00 #dm^3# contains 8.00 moles of oxygen gas at a temperature of 50.0 K. What is the pressure inside the cylinder? | null |
35 | a872095b-6ddd-11ea-a835-ccda262736ce | https://socratic.org/questions/using-graham-s-law-of-effusion-if-co2-takes-32sec-to-effuse-how-long-will-the-hy-1 | 7.71 sec | start physical_unit 15 15 time s qc_end physical_unit 6 6 8 9 time qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"take time [OF] hydrogen [IN] sec"}] | [{"type":"physical unit","value":"7.71 sec"}] | [{"type":"physical unit","value":"effused time [OF] CO2 [=] \\pu{32 sec}"},{"type":"other","value":"Graham's law of effusion"}] | <h1 class="questionTitle" itemprop="name">Using Graham's law of effusion, if #"CO"_2# takes 32 sec to effuse, how long will hydrogen take?</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>using Graham's law of effusion, if co2 takes 32sec to effuse how long will the hydrogen take?</p></div>
</h2>
</div>
</div> | 7.71 sec | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong>Graham's Law of Effusion</strong> tells you that the <em>rate of effusion</em> of a gas is <strong>inversely proportional</strong> to the square root of the mass of the particles of gas. </p>
<p>This can be... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"7.7 s"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong>Graham's Law of Effusion</strong> tells you that the ... | <article>
<h1 class="questionTitle" itemprop="name">Using Graham's law of effusion, if #"CO"_2# takes 32 sec to effuse, how long will hydrogen take?</h1>
<div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>using Graham's law... | Using Graham's law of effusion, if #"CO"_2# takes 32 sec to effuse, how long will hydrogen take? |
using Graham's law of effusion, if co2 takes 32sec to effuse how long will the hydrogen take?
|
36 | aada3818-6ddd-11ea-8192-ccda262736ce | https://socratic.org/questions/what-is-the-molarity-of-a-solution-made-of-2-5-moles-of-kno-3-in-5-l-of-water | 0.50 M | start physical_unit 6 6 molarity mol/l qc_end physical_unit 12 12 9 10 mole qc_end physical_unit 17 17 14 15 volume qc_end end | [{"type":"physical unit","value":"Molarity [OF] the solution [IN] M"}] | [{"type":"physical unit","value":"0.50 M"}] | [{"type":"physical unit","value":"Mole [OF] KNO3 [=] \\pu{2.5 moles}"},{"type":"physical unit","value":"Volume [OF] water [=] \\pu{5 L}"}] | <h1 class="questionTitle" itemprop="name"> What is the molarity of a solution made of 2.5 moles of #KNO_3# in 5 L of water?</h1> | null | 0.50 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Molarity"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#("Moles of solute")/("Volume of solution (L)")#</mathjax></p>
<p><mathjax>#=#</mathjax> <mathjax>#(2.50*mol)/(5*L)#</mathjax> <mathjax>#=#</mathjax> ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"Molarity"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#0.50#</mathjax> <mathjax>#mol*L^-1#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div... | <article>
<h1 class="questionTitle" itemprop="name"> What is the molarity of a solution made of 2.5 moles of #KNO_3# in 5 L of water?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="bre... | What is the molarity of a solution made of 2.5 moles of #KNO_3# in 5 L of water? | null |
37 | ac4565c0-6ddd-11ea-87ae-ccda262736ce | https://socratic.org/questions/how-many-moles-of-argon-are-in-452-g-of-argon | 13.31 moles | start physical_unit 4 4 mole mol qc_end physical_unit 4 4 7 8 mass qc_end end | [{"type":"physical unit","value":"Mole [OF] argon [IN] moles"}] | [{"type":"physical unit","value":"13.31 moles"}] | [{"type":"physical unit","value":"Mass [OF] argon [=] \\pu{452 g}"}] | <h1 class="questionTitle" itemprop="name">How many moles of argon are in 452 g of argon?</h1> | null | 13.31 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>In order to convert a substance from grams to moles, you must use that substance's molar mass. In this case, Argon's molar mass can be found using the periodic table. You can round however you like, but I am using ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The number of moles in 452 grams of Argon is 13.31 moles.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>In order to convert a substance ... | <article>
<h1 class="questionTitle" itemprop="name">How many moles of argon are in 452 g of argon?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry... | How many moles of argon are in 452 g of argon? | null |
38 | a8e2c0b4-6ddd-11ea-bd5e-ccda262736ce | https://socratic.org/questions/how-much-heat-must-be-removed-to-freeze-a-tray-of-ice-cubes-at-0c-the-mass-of-th | 18 kcal | start physical_unit 11 12 heat_energy kcal qc_end physical_unit 11 12 14 15 temperature qc_end physical_unit 20 20 22 23 mass qc_end end | [{"type":"physical unit","value":"Removed heat [OF] ice cubes [IN] kcal"}] | [{"type":"physical unit","value":"18 kcal"}] | [{"type":"physical unit","value":"Temperature [OF] ice cubes [=] \\pu{0 ℃}"},{"type":"physical unit","value":"Mass [OF] water [=] \\pu{225 g}"},{"type":"physical unit","value":"Tray number [OF] ice cubes [=] \\pu{1}"}] | <h1 class="questionTitle" itemprop="name">How much heat must be removed to freeze a tray of ice cubes at 0C? The mass of the water is 225 g? </h1> | null | 18 kcal | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <strong>latent heat</strong> of water freezing is <mathjax>#80"cal/g"#</mathjax> -- that amount of heat has to be removed to freeze water at a constant temperature equal to its melting/freezing point <mathjax>#... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#18"kcal"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <strong>latent heat</strong> of water freezing is <math... | <article>
<h1 class="questionTitle" itemprop="name">How much heat must be removed to freeze a tray of ice cubes at 0C? The mass of the water is 225 g? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url"... | How much heat must be removed to freeze a tray of ice cubes at 0C? The mass of the water is 225 g? | null |
39 | aa4eb08a-6ddd-11ea-83ba-ccda262736ce | https://socratic.org/questions/diphosphorus-pentaoxide-reacts-with-water-to-produce-phosphoric-acid-h-3po-4-how | P4O10(s) + 6 H2O(l) -> 4 H3PO4(aq) | start chemical_equation qc_end substance 0 1 qc_end substance 4 4 qc_end chemical_equation 10 10 qc_end end | [{"type":"other","value":"Chemical Equation [OF] this reaction"}] | [{"type":"chemical equation","value":"P4O10(s) + 6 H2O(l) -> 4 H3PO4(aq)"}] | [{"type":"substance name","value":"Diphosphorus pentoxide"},{"type":"substance name","value":"Water"},{"type":"chemical equation","value":"H3PO4"}] | <h1 class="questionTitle" itemprop="name">Diphosphorus pentoxide reacts with water to produce phosphoric acid (#H_3PO_4#). How do you write the balanced equation for this reaction?</h1> | null | P4O10(s) + 6 H2O(l) -> 4 H3PO4(aq) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The interesting thing about <em>diphosphorus pentoxide</em>, <mathjax>#"P"_2"O"_5#</mathjax>, is that it usually exists as a <em>dimer</em>. </p>
<p>This implies that <mathjax>#"P"_2"O"_5#</mathjax> is actually the... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"P"_4"O"_text(10(s]) + 6"H"_2"O"_text((l]) -> 4"H"_3"PO"_text(4(aq])#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown">... | <article>
<h1 class="questionTitle" itemprop="name">Diphosphorus pentoxide reacts with water to produce phosphoric acid (#H_3PO_4#). How do you write the balanced equation for this reaction?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrum... | Diphosphorus pentoxide reacts with water to produce phosphoric acid (#H_3PO_4#). How do you write the balanced equation for this reaction? | null |
40 | a9cd71f8-6ddd-11ea-b23c-ccda262736ce | https://socratic.org/questions/what-is-the-ph-of-1-2-10-3-hbr-solution | 2.92 | start physical_unit 9 10 ph none qc_end physical_unit 9 10 5 8 molarity qc_end end | [{"type":"physical unit","value":"pH [OF] HBr solution"}] | [{"type":"physical unit","value":"2.92"}] | [{"type":"physical unit","value":"Molarity [OF] HBr solution [=] \\pu{1.2 × 10^(-3) M}"}] | <h1 class="questionTitle" itemprop="name">What is the pH of #1.2 * 10^-3# HBr solution?</h1> | null | 2.92 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Even without doing any calculations, you can say that the <a href="http://socratic.org/chemistry/acids-and-bases/the-ph-concept">pH</a> of this solution will be <em>a little lower</em> than <mathjax>#3#</mathjax>. ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#2.92#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Even without doing any calculations, you can say that the <a hre... | <article>
<h1 class="questionTitle" itemprop="name">What is the pH of #1.2 * 10^-3# HBr solution?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry<... | What is the pH of #1.2 * 10^-3# HBr solution? | null |
41 | ab4d69c2-6ddd-11ea-bc6a-ccda262736ce | https://socratic.org/questions/what-is-the-mass-of-water-produced-when-9-33-g-of-butane-reacts-with-excess-oxyg | 14.50 g | start physical_unit 5 5 mass g qc_end physical_unit 11 11 8 9 mass qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Mass [OF] water [IN] g"}] | [{"type":"physical unit","value":"14.50 g"}] | [{"type":"physical unit","value":"Mass [OF] butane [=] \\pu{9.33 g}"},{"type":"other","value":"Excess oxygen."}] | <h1 class="questionTitle" itemprop="name">What is the mass of water produced when 9.33 g of butane reacts with excess oxygen?</h1> | null | 14.50 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#C_4H_10(g) + 13/2O_2(g) rarr 4CO_2(g) + 5H_2O(l)#</mathjax></p>
<p><mathjax>#"Moles of butane"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#(9.33*g)/(58.12*g*mol^-1)#</mathjax> <mathjax>#=#</mathjax> <math... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#5xx0.161*molxx18.01*g*mol^-1=??#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#C_4H_10(g) + 13/2O_2(g) rar... | <article>
<h1 class="questionTitle" itemprop="name">What is the mass of water produced when 9.33 g of butane reacts with excess oxygen?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="b... | What is the mass of water produced when 9.33 g of butane reacts with excess oxygen? | null |
42 | aa9f9388-6ddd-11ea-aa80-ccda262736ce | https://socratic.org/questions/how-many-carbon-dioxide-molecules-are-needed-to-make-a-single-glucose-molecule | 6 | start physical_unit 2 4 number none qc_end end | [{"type":"physical unit","value":"Number [OF] carbon dioxide molecules"}] | [{"type":"physical unit","value":"6"}] | [{"type":"physical unit","value":"Number [OF] glucose molecule [=] \\pu{1}"}] | <h1 class="questionTitle" itemprop="name">How many carbon dioxide molecules are needed to make a single glucose molecule? </h1> | null | 6 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>Glucose is <mathjax>#"C"_6"H"_12"O"_6#</mathjax>.</p>
<p>Remember the equation for photosynthesis:</p>
<p><mathjax>#"6CO"_2 + "6H"_2"O" → "C"_6"H"_12"O"_6 + "6O"_2#</mathjax></p></div>
</... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>You need 6 molecules of <mathjax>#"CO"_2#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>Glucose is ... | <article>
<h1 class="questionTitle" itemprop="name">How many carbon dioxide molecules are needed to make a single glucose molecule? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="brea... | How many carbon dioxide molecules are needed to make a single glucose molecule? | null |
43 | ace02b36-6ddd-11ea-8e90-ccda262736ce | https://socratic.org/questions/what-is-the-mole-ratio-of-fe-3o-4-to-fe-in-the-equation-3fe-4h-2o-fe-3o-4-4h-2 | 1:3 | start physical_unit 6 8 mole_fraction none qc_end chemical_equation 12 21 qc_end end | [{"type":"physical unit","value":"Mole ratio [OF] Fe3O4 to Fe"}] | [{"type":"physical unit","value":"1:3"}] | [{"type":"chemical equation","value":"3 Fe + 4 H2O -> Fe3O4 + 4 H2"}] | <h1 class="questionTitle" itemprop="name">What is the mole ratio of #Fe_3O_4# to #Fe# in the equation #3Fe + 4H_2O -> Fe_3O_4 + 4H_2#?</h1> | null | 1:3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><ol>
<li>To determine <a href="http://socratic.org/chemistry/the-mole-concept/the-mole">the mole</a> ratio of <a href="http://socratic.org/chemistry/chemical-reactions/chemical-equations">chemical equations</a>, gener... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#(Fe_3O_4)/(Fe)#</mathjax> is equal to<br/>
<mathjax>#(1 mol)/(3 mol)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><ol... | <article>
<h1 class="questionTitle" itemprop="name">What is the mole ratio of #Fe_3O_4# to #Fe# in the equation #3Fe + 4H_2O -> Fe_3O_4 + 4H_2#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<s... | What is the mole ratio of #Fe_3O_4# to #Fe# in the equation #3Fe + 4H_2O -> Fe_3O_4 + 4H_2#? | null |
44 | a8f0eb2c-6ddd-11ea-ac83-ccda262736ce | https://socratic.org/questions/what-is-the-ph-of-a-0-150-m-naoh-solution | 13.18 | start physical_unit 8 9 ph none qc_end physical_unit 8 9 6 7 molarity qc_end end | [{"type":"physical unit","value":"pH [OF] NaOH solution"}] | [{"type":"physical unit","value":"13.18"}] | [{"type":"physical unit","value":"Molarity [OF] NaOH solution [=] \\pu{0.150 M}"}] | <h1 class="questionTitle" itemprop="name">What is the pH of a #"0.150-M"# #"NaOH"# solution?</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>The answer is 13.18 but I'm not sure how to get that answer? From what I know the formula is pH = -log[H+] so I just put -log(.150) which = .82 but that's not the correct a... | 13.18 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <mathjax>#"pH"#</mathjax> of the solution is given by </p>
<blockquote>
<p><mathjax>#color(blue)(ul(color(black)("pH" = - log (["H"_3"O"^(+)]))))#</mathjax></p>
</blockquote>
<p>so you can't use</p>
<blockquote... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#13.176#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <mathjax>#"pH"#</mathjax> of the solution is given by </p>... | <article>
<h1 class="questionTitle" itemprop="name">What is the pH of a #"0.150-M"# #"NaOH"# solution?</h1>
<div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>The answer is 13.18 but I'm not sure how to get that answer? Fro... | What is the pH of a #"0.150-M"# #"NaOH"# solution? |
The answer is 13.18 but I'm not sure how to get that answer? From what I know the formula is pH = -log[H+] so I just put -log(.150) which = .82 but that's not the correct answer. Can someone please correct me and show steps?
|
45 | abe1e5dc-6ddd-11ea-9fab-ccda262736ce | https://socratic.org/questions/how-many-moles-are-in-3-70-10-1-g-of-boron | 0.03 moles | start physical_unit 10 10 mole mol qc_end physical_unit 10 10 5 8 mass qc_end end | [{"type":"physical unit","value":"Mole [OF] boron [IN] moles"}] | [{"type":"physical unit","value":"0.03 moles"}] | [{"type":"physical unit","value":"Mass [OF] boron [=] \\pu{3.70 × 10^(-1) g}"}] | <h1 class="questionTitle" itemprop="name">How many moles are in #3.70 * 10^-1# g of boron?</h1> | null | 0.03 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Molar quantity <mathjax>#=#</mathjax> <mathjax>#(3.70xx10^(-1)*cancelg)/(10.81*cancelg*mol^-1)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#?? mol#</mathjax>. Note how this treatment is dimensionally consistent; I ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>1 mol of boron has a mass of <mathjax>#10.81#</mathjax> <mathjax>#g#</mathjax>. To find the molar quantity divide the mass by the molar mass.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHead... | <article>
<h1 class="questionTitle" itemprop="name">How many moles are in #3.70 * 10^-1# g of boron?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemist... | How many moles are in #3.70 * 10^-1# g of boron? | null |
46 | abef1bf2-6ddd-11ea-aef3-ccda262736ce | https://socratic.org/questions/if-it-takes-41-72-joules-to-heat-a-piece-of-gold-weighing-18-69-g-from-10-0-c-to | 0.13 J/(g * ℃) | start physical_unit 26 27 specific_heat j/(°c_·_g) qc_end physical_unit 26 27 3 4 heat_energy qc_end physical_unit 26 27 12 13 mass qc_end physical_unit 26 27 15 16 temperature qc_end physical_unit 26 27 18 19 temperature qc_end end | [{"type":"physical unit","value":"Specific heat [OF] the gold [IN] J/(g * ℃)"}] | [{"type":"physical unit","value":"0.13 J/(g * ℃)"}] | [{"type":"physical unit","value":"Taken energy [OF] the gold [=] \\pu{41.72 joules}"},{"type":"physical unit","value":"Weight [OF] the gold [=] \\pu{18.69 g}"},{"type":"physical unit","value":"Temperature1 [OF] the gold [=] \\pu{10.0 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] the gold [=] \\pu{27.0 ℃}"}] | <h1 class="questionTitle" itemprop="name">If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0°C to 27.0°C, what is the specific heat of the gold?</h1> | null | 0.13 J/(g * ℃) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The amount of heat (<mathjax>#q#</mathjax>) absorbed by gold could be expressed as:</p>
<p><mathjax>#q=mxxsxxDeltaT#</mathjax></p>
<p>where, <mathjax>#m=18.69g#</mathjax> is the mass of the object,<br/>
<mathjax>#s... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#s=0.131J/(g*""^@C)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The amount of heat (<mathjax>#q#</mathjax>) absorb... | <article>
<h1 class="questionTitle" itemprop="name">If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0°C to 27.0°C, what is the specific heat of the gold?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href... | If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0°C to 27.0°C, what is the specific heat of the gold? | null |
47 | ad118c5e-6ddd-11ea-ac64-ccda262736ce | https://socratic.org/questions/595c0fb47c014916d2f5f5d3 | 1.51 ppm | start physical_unit 14 15 concentration ppm qc_end physical_unit 2 2 4 6 equilibrium_constant_k qc_end end | [{"type":"physical unit","value":"Concentration [OF] ZnCO3 saturated solution [IN] ppm"}] | [{"type":"physical unit","value":"1.51 ppm"}] | [{"type":"physical unit","value":"Ksp [OF] ZnCO3 [=] \\pu{1.46 × 10^(-10)}"}] | <h1 class="questionTitle" itemprop="name">Given #K_"sp"# #ZnCO_3=1.46xx10^-10#, what is the #"ppm"# concentration of a saturated solution? </h1> | null | 1.51 ppm | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#ZnCO_3 rightleftharpoons Zn^(+2) + CO_3^(2-)#</mathjax> is a 1:1 ionization ratio. The solubility can be determined using <mathjax>#S = sqrt(Ksp)#</mathjax></p>
<p><mathjax>#S = sqrt(Ksp) = sqrt(1.46xx10^... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#S = 1.21xx10^-5M = 1.51xx10^-3(g/L)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#ZnCO_3 rightleftharpoon... | <article>
<h1 class="questionTitle" itemprop="name">Given #K_"sp"# #ZnCO_3=1.46xx10^-10#, what is the #"ppm"# concentration of a saturated solution? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
... | Given #K_"sp"# #ZnCO_3=1.46xx10^-10#, what is the #"ppm"# concentration of a saturated solution? | null |
48 | ac6f52ca-6ddd-11ea-8a88-ccda262736ce | https://socratic.org/questions/given-the-reaction-2c3h7oh-9o2-co2-8h2o-how-many-moles-of-oxygen-are-needed-to-r | 15.30 moles | start physical_unit 17 17 mole mol qc_end chemical_equation 3 12 qc_end physical_unit 4 4 23 24 mole qc_end end | [{"type":"physical unit","value":"Mole [OF] oxygen [IN] moles"}] | [{"type":"physical unit","value":"15.30 moles"}] | [{"type":"physical unit","value":"Mole [OF] C3H7OH [=] \\pu{3.40 mol}"},{"type":"chemical equation","value":"2 C3H7OH + 9 O2 -> CO2 + 8 H2O"}] | <h1 class="questionTitle" itemprop="name"> Given the reaction 2C3H7OH + 9O2 -->CO2 + 8H2O, how many moles of oxygen are needed to react with 3.40 mol C3H7OH?
</h1> | null | 15.30 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Equation:</p>
<p><mathjax>#C_3H_7OH + 9/2O_2#</mathjax> <mathjax>#rarr#</mathjax> <mathjax>#3CO_2 + 4H_2O#</mathjax></p>
<p>Is the equation above balanced? (If this was change from a large denomination bill I thin... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>Given the balanced equation to follow, <mathjax>#9/2#</mathjax> moles of dioxygen gas are required to combust 1 mol propanol. So the answer? </p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHea... | <article>
<h1 class="questionTitle" itemprop="name"> Given the reaction 2C3H7OH + 9O2 -->CO2 + 8H2O, how many moles of oxygen are needed to react with 3.40 mol C3H7OH?
</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chem... | Given the reaction 2C3H7OH + 9O2 -->CO2 + 8H2O, how many moles of oxygen are needed to react with 3.40 mol C3H7OH?
| null |
49 | ad27b9f4-6ddd-11ea-8a3c-ccda262736ce | https://socratic.org/questions/a-5-00-l-container-contains-ch-4-at-35-c-with-a-total-pressure-of-1-81-atm-what- | 0.35 atm | start physical_unit 5 5 pressure atm qc_end physical_unit 5 5 1 2 volume qc_end physical_unit 5 5 7 8 temperature qc_end physical_unit 5 5 14 15 total_pressure qc_end physical_unit 5 5 27 28 volume qc_end physical_unit 5 5 30 31 temperature qc_end end | [{"type":"physical unit","value":"Pressure2 [OF] CH4 [IN] atm"}] | [{"type":"physical unit","value":"0.35 atm"}] | [{"type":"physical unit","value":"Volume1 [OF] CH4 [=] \\pu{5.00 L}"},{"type":"physical unit","value":"Temperature1 [OF] CH4 [=] \\pu{35 ℃}"},{"type":"physical unit","value":"Total pressure1 [OF] CH4 [=] \\pu{1.81 atm}"},{"type":"physical unit","value":"Volume2 [OF] CH4 [=] \\pu{25.0 L}"},{"type":"physical unit","value... | <h1 class="questionTitle" itemprop="name">A 5.00 L container contains #CH_4# at 35°C with a total pressure of 1.81 atm. What is the pressure of the gas when it expands to 25.0 L at 25°C? </h1> | null | 0.35 atm | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#(P_1V_1)/T_1=(P_2V_2)/T_2#</mathjax></p>
<p><mathjax>#P_2=(P_1V_1)/T_1xxT_2/V_2#</mathjax></p>
<p><mathjax>#=(1.81*atmxx5.00*Lxx298*K)/(308*Kxx25.0*L)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#??atm#</m... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#(P_1V_1)/T_1=(P_2V_2)/T_2#</mathjax> <mathjax>#~=#</mathjax> <mathjax>#0.4*atm#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="mar... | <article>
<h1 class="questionTitle" itemprop="name">A 5.00 L container contains #CH_4# at 35°C with a total pressure of 1.81 atm. What is the pressure of the gas when it expands to 25.0 L at 25°C? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Br... | A 5.00 L container contains #CH_4# at 35°C with a total pressure of 1.81 atm. What is the pressure of the gas when it expands to 25.0 L at 25°C? | null |
50 | ad0c82e1-6ddd-11ea-9422-ccda262736ce | https://socratic.org/questions/if-a-buffer-made-by-dissolving-20-0-g-of-sodium-benzoate-144g-mol-and-10-grams-o | 4.43 | start physical_unit 35 36 ph none qc_end physical_unit 9 10 6 7 mass qc_end physical_unit 9 10 11 12 molar_mass qc_end physical_unit 17 18 14 15 mass qc_end physical_unit 17 18 19 20 molar_mass qc_end substance 22 22 qc_end physical_unit 35 36 28 29 volume qc_end end | [{"type":"physical unit","value":"pH [OF] the buffer"}] | [{"type":"physical unit","value":"4.43"}] | [{"type":"physical unit","value":"Mass [OF] sodium benzoate [=] \\pu{20.0 g}"},{"type":"physical unit","value":"Molar mass [OF] sodium benzoate [=] \\pu{144 g/mol}"},{"type":"physical unit","value":"Mass [OF] benzoic acid [=] \\pu{10 grams}"},{"type":"physical unit","value":"Molar mass [OF] benzoic acid [=] \\pu{122 g/... | <h1 class="questionTitle" itemprop="name">If a buffer made by dissolving 20.0 g of sodium benzoate (144g/mol) and 10 grams of benzoic acid (122g/mol) in water to a final volume of 500.0 ml, what is the pH of the buffer? </h1> | null | 4.43 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>To find the <a href="https://socratic.org/chemistry/acids-and-bases/the-ph-concept">pH</a> of the buffered solution in question, we can simply use the Henderson-Hasselbach equation:</p>
<p><mathjax>#pH=pK_a+log(([B... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#pH=4.43#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>To find the <a href="https://socratic.org/chemistry/acids-an... | <article>
<h1 class="questionTitle" itemprop="name">If a buffer made by dissolving 20.0 g of sodium benzoate (144g/mol) and 10 grams of benzoic acid (122g/mol) in water to a final volume of 500.0 ml, what is the pH of the buffer? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemty... | If a buffer made by dissolving 20.0 g of sodium benzoate (144g/mol) and 10 grams of benzoic acid (122g/mol) in water to a final volume of 500.0 ml, what is the pH of the buffer? | null |
51 | ab7694b4-6ddd-11ea-97f0-ccda262736ce | https://socratic.org/questions/an-aqueous-solution-of-lead-ii-phosphate-is-added-to-an-aqueous-solution-of-pota | PbHPO4(aq) + 2 KI(aq) -> PbI2(s) + KH2PO4 | start chemical_equation qc_end c_other OTHER qc_end end | [{"type":"other","value":"Chemical Equation [OF] the balanced chemical equation"}] | [{"type":"chemical equation","value":"PbHPO4(aq) + 2 KI(aq) -> PbI2(s) + KH2PO4"}] | [{"type":"other","value":"When the two colorless solutions mix, a bright yellow precipitate forms in a double replacement reaction."},{"type":"substance name","value":"Lead II phosphate aqueous solution"},{"type":"substance name","value":"Potassium iodide aqueous solution"}] | <h1 class="questionTitle" itemprop="name">An aqueous solution of lead II phosphate is added to an aqueous solution of potassium iodide. When the two colorless solutions mix, a bright yellow precipitate forms in a double replacement reaction. What is the balanced chemical equation? </h1> | null | PbHPO4(aq) + 2 KI(aq) -> PbI2(s) + KH2PO4 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This question is unfortunate as phosphate salts tend to be as soluble as bricks, and lead phosphate, <mathjax>#Pb_3(PO_4)_2#</mathjax> would be even more insoluble. Thus I have assumed a biphosphate salt; <mathjax... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#PbHPO_4(aq) + 2KI(aq) rarr PbI_2(s)darr + KH_2PO_4#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This question is u... | <article>
<h1 class="questionTitle" itemprop="name">An aqueous solution of lead II phosphate is added to an aqueous solution of potassium iodide. When the two colorless solutions mix, a bright yellow precipitate forms in a double replacement reaction. What is the balanced chemical equation? </h1>
<div class="clearfix">... | An aqueous solution of lead II phosphate is added to an aqueous solution of potassium iodide. When the two colorless solutions mix, a bright yellow precipitate forms in a double replacement reaction. What is the balanced chemical equation? | null |
52 | aad18ed3-6ddd-11ea-b445-ccda262736ce | https://socratic.org/questions/57c7fc4b11ef6b28d3890fab | 116.25 g | start physical_unit 3 4 mass g qc_end physical_unit 14 14 10 11 mass qc_end physical_unit 21 22 17 18 mass qc_end end | [{"type":"physical unit","value":"Mass [OF] ammonium sulfate [IN] g"}] | [{"type":"physical unit","value":"116.25 g"}] | [{"type":"physical unit","value":"Mass [OF] ammonia [=] \\pu{30 g}"},{"type":"physical unit","value":"Mass [OF] sulfuric acid [=] \\pu{196 g}"}] | <h1 class="questionTitle" itemprop="name">What mass of #"ammonium sulfate"# can be prepared from a #30*g# mass of #"ammonia"#, and a #196*g# mass of #"sulfuric acid"#?</h1> | null | 116.25 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We have a balanced chemical equation that represents the <a href="https://socratic.org/chemistry/reactions-in-solution/neutralization">neutralization</a> of ammonia by sulfuric acid.</p>
<p><mathjax>#"Moles of ammo... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#2NH_3(aq) + H_2SO_4(aq) rarr (NH_4)_2SO_4(aq)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We have a balanced chem... | <article>
<h1 class="questionTitle" itemprop="name">What mass of #"ammonium sulfate"# can be prepared from a #30*g# mass of #"ammonia"#, and a #196*g# mass of #"sulfuric acid"#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="... | What mass of #"ammonium sulfate"# can be prepared from a #30*g# mass of #"ammonia"#, and a #196*g# mass of #"sulfuric acid"#? | null |
53 | ab6600c8-6ddd-11ea-9f26-ccda262736ce | https://socratic.org/questions/what-is-the-formula-mass-for-carbon-tetrafloride | 88.00 amu | start physical_unit 6 7 molecular_weight amu qc_end substance 6 7 qc_end end | [{"type":"physical unit","value":"Formula mass [OF] carbon tetrafloride [IN] amu"}] | [{"type":"physical unit","value":"88.00 amu"}] | [{"type":"substance name","value":"Carbon tetrafloride"}] | <h1 class="questionTitle" itemprop="name">What is the formula mass for carbon tetrafloride?</h1> | null | 88.00 amu | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><ol>
<li>Write down the formula of the compound;<br/>
<mathjax>#CF_4#</mathjax></li>
<li>Identify the number of atoms of each element composing the compound;<br/>
<mathjax>#C=1#</mathjax><br/>
<mathjax>#F=4#</mathjax>... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#88#</mathjax> amu</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><ol>
<li>Write down the formula of the compound;<br/>
<mathjax>#C... | <article>
<h1 class="questionTitle" itemprop="name">What is the formula mass for carbon tetrafloride?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemis... | What is the formula mass for carbon tetrafloride? | null |
54 | aaf573ee-6ddd-11ea-a5b2-ccda262736ce | https://socratic.org/questions/find-the-molecular-formula-of-an-acid-with-a-molar-mass-of-98-grams-per-moles-an | H2SO4 | start chemical_formula qc_end physical_unit 24 25 12 15 molar_mass qc_end end | [{"type":"other","value":"Chemical Formula [OF] the acid [IN] molecular"}] | [{"type":"chemical equation","value":"H2SO4"}] | [{"type":"physical unit","value":"Molar mass [OF] the acid [=] \\pu{98 grams per moles}"},{"type":"physical unit","value":"Percentage composition [OF] hydrogen in the acid [=] \\pu{2%}"},{"type":"physical unit","value":"Percentage composition [OF] sulphur in the acid [=] \\pu{33%}"},{"type":"physical unit","value":"Per... | <h1 class="questionTitle" itemprop="name">Find the molecular formula of an acid with a molar mass of 98 grams per moles and the percentage composition of the elements in the acid is as such: hydrogen=2%, sulphur=33%, oxygen=65% ?</h1> | null | H2SO4 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We must first find the empirical formula.</p>
<p>We can say that, in a <mathjax>#100"g"#</mathjax> sample, we have <mathjax>#2"g"#</mathjax> hydrogen, <mathjax>#"33g"#</mathjax> sulfur, and <mathjax>#65"g"#</mathja... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"H"_2"SO"_4#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We must first find the empirical formula.</p>
<p>We can s... | <article>
<h1 class="questionTitle" itemprop="name">Find the molecular formula of an acid with a molar mass of 98 grams per moles and the percentage composition of the elements in the acid is as such: hydrogen=2%, sulphur=33%, oxygen=65% ?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope=... | Find the molecular formula of an acid with a molar mass of 98 grams per moles and the percentage composition of the elements in the acid is as such: hydrogen=2%, sulphur=33%, oxygen=65% ? | null |
55 | a875a94c-6ddd-11ea-b15f-ccda262736ce | https://socratic.org/questions/59a4324d7c014974b1114933 | 48 × 10^23 | start physical_unit 2 3 number none qc_end physical_unit 10 11 6 7 quantity qc_end end | [{"type":"physical unit","value":"number [OF] oxygen atoms"}] | [{"type":"physical unit","value":"48 × 10^23"}] | [{"type":"physical unit","value":"quantity [OF] carbon dioxide [=] \\pu{8 mole}"}] | <h1 class="questionTitle" itemprop="name">How many oxygen atoms in an 8 mole quantity of carbon dioxide?</h1> | null | 48 × 10^23 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Before we do this in detail, let us suppose that the question asked....<mathjax>#"find the number of atoms in 8 DOZEN molecules of"#</mathjax> <mathjax>#CO_2#</mathjax>.</p>
<p>And thus, there are <mathjax>#3*"atom... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>There are <mathjax>#24*mol#</mathjax> of atoms in <mathjax>#8*mol#</mathjax> of <mathjax>#CO_2#</mathjax>....</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div ... | <article>
<h1 class="questionTitle" itemprop="name">How many oxygen atoms in an 8 mole quantity of carbon dioxide?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="... | How many oxygen atoms in an 8 mole quantity of carbon dioxide? | null |
56 | ab230f6f-6ddd-11ea-8949-ccda262736ce | https://socratic.org/questions/if-i-have-45-liters-of-helium-in-a-balloon-at-25-degress-celcius-and-increase-th | 49.53 L | start physical_unit 6 6 volume l qc_end physical_unit 6 6 3 4 volume qc_end physical_unit 6 6 11 13 temperature qc_end physical_unit 6 6 19 21 temperature qc_end end | [{"type":"physical unit","value":"Volume2 [OF] helium [IN] L"}] | [{"type":"physical unit","value":"49.53 L"}] | [{"type":"physical unit","value":"Volume1 [OF] helium [=] \\pu{45 liters}"},{"type":"physical unit","value":"Temperature1 [OF] helium [=] \\pu{25 degress celcius}"},{"type":"physical unit","value":"Temperature2 [OF] helium [=] \\pu{55 degrees celcius}"}] | <h1 class="questionTitle" itemprop="name">If I have 45 liters of helium in a balloon at 25 degress celcius and increase the tempurate to 55 degrees celcius what will the new volume be? </h1> | null | 49.53 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This is a problem involving the temperature-volume relationship of gases, which is represented by Charles's law: </p>
<p><mathjax>#(V_1)/(T_1) = (V_2)/(T_2)#</mathjax></p>
<p>Remember that <mathjax>#T#</mathjax> is... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#50.L#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This is a problem involving the temperature-volume relationship ... | <article>
<h1 class="questionTitle" itemprop="name">If I have 45 liters of helium in a balloon at 25 degress celcius and increase the tempurate to 55 degrees celcius what will the new volume be? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Brea... | If I have 45 liters of helium in a balloon at 25 degress celcius and increase the tempurate to 55 degrees celcius what will the new volume be? | null |
57 | aca33a69-6ddd-11ea-85c1-ccda262736ce | https://socratic.org/questions/what-is-the-percentage-of-water-in-mn-2-co-3-3-8h-2o | 55.63% | start physical_unit 5 7 percent none qc_end chemical_equation 7 7 qc_end end | [{"type":"physical unit","value":"Percentage [OF] water in MnCO3.8H2O"}] | [{"type":"physical unit","value":"55.63%"}] | [{"type":"chemical equation","value":"MnCO3.8H2O"}] | <h1 class="questionTitle" itemprop="name">What is the percentage of water in #"MnCO"_3 *8"H"_2"O"#?</h1> | null | 55.63% | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You're dealing with a <strong>hydrated compound</strong>, also known as a <em>hydrate</em>, called <em>manganese(II) carbonate octahydrate</em>, <mathjax>#"MnCO"_3 * 8"H"_2"O"#</mathjax>. </p>
<p>This hydrate conta... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"55.63% H"_2"O"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You're dealing with a <strong>hydrated compound</stro... | <article>
<h1 class="questionTitle" itemprop="name">What is the percentage of water in #"MnCO"_3 *8"H"_2"O"#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title... | What is the percentage of water in #"MnCO"_3 *8"H"_2"O"#? | null |
58 | a92f2239-6ddd-11ea-a350-ccda262736ce | https://socratic.org/questions/5856a8c1b72cff6a47c93077 | 2.47 kJ | start physical_unit 10 10 heat_energy kj qc_end physical_unit 10 10 7 8 volume qc_end end | [{"type":"physical unit","value":"Absorbed energy [OF] nitrogen [IN] kJ"}] | [{"type":"physical unit","value":"2.47 kJ"}] | [{"type":"physical unit","value":"Volume [OF] nitrogen [=] \\pu{6.03 L}"}] | <h1 class="questionTitle" itemprop="name">How much energy does the oxidation of 6.03 L of nitrogen absorb?</h1> | null | 2.47 kJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>You don’t say what the oxidation product is, so I shall assume that it is dinitrogen tetroxide.</p>
<p>Then the reaction is</p>
<p><mathjax>#"N"_2 + "2O"_2 → "N"_2"O"_4; Δ_text(f)H = "9.16... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><blockquote></blockquote>
<p>The reaction absorbs 2.47 kJ.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>You don’... | <article>
<h1 class="questionTitle" itemprop="name">How much energy does the oxidation of 6.03 L of nitrogen absorb?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop... | How much energy does the oxidation of 6.03 L of nitrogen absorb? | null |
59 | a96e467a-6ddd-11ea-8513-ccda262736ce | https://socratic.org/questions/to-reduce-16-ounces-of-a-25-solution-of-antiseptic-to-a-10-solution-how-much-dis | 24 ounces | start physical_unit 16 17 mass oz qc_end physical_unit 7 7 2 3 mass qc_end physical_unit 9 9 6 6 percent qc_end physical_unit 9 9 12 12 percent qc_end end | [{"type":"physical unit","value":"Added mass [OF] distilled water [IN] ounces"}] | [{"type":"physical unit","value":"24 ounces"}] | [{"type":"physical unit","value":"Mass1 [OF] antiseptic solution [=] \\pu{16 ounces}"},{"type":"physical unit","value":"Percent1 [OF] antiseptic in solution [=] \\pu{25%}"},{"type":"physical unit","value":"Percent2 [OF] antiseptic in solution [=] \\pu{10%}"}] | <h1 class="questionTitle" itemprop="name">To reduce 16 ounces of a 25% solution of antiseptic to a 10% solution, how much distilled water should a nurse add? </h1> | null | 24 ounces | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Here's a more intuitive approach to use here.</p>
<p>You know that your initial solution has a <a href="https://socratic.org/chemistry/solutions-and-their-behavior/percent-concentration">percent concentration</a>, ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"24 ounces"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Here's a more intuitive approach to use here.</p>
<p>You ... | <article>
<h1 class="questionTitle" itemprop="name">To reduce 16 ounces of a 25% solution of antiseptic to a 10% solution, how much distilled water should a nurse add? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistr... | To reduce 16 ounces of a 25% solution of antiseptic to a 10% solution, how much distilled water should a nurse add? | null |
60 | ac17b45a-6ddd-11ea-ae82-ccda262736ce | https://socratic.org/questions/590f404b7c01491563104c53 | C6H12O6 | start chemical_formula qc_end physical_unit 7 7 21 22 molecular_weight qc_end end | [{"type":"other","value":"Chemical Formula [OF] the material [IN] molecular"}] | [{"type":"chemical equation","value":"C6H12O6"}] | [{"type":"physical unit","value":"Percentage composition [OF] C in the material [=] \\pu{40.5%}"},{"type":"physical unit","value":"Percentage composition [OF] H in the material [=] \\pu{6.67%}"},{"type":"physical unit","value":"Percentage composition [OF] O in the material [=] \\pu{53.33%}"},{"type":"physical unit","va... | <h1 class="questionTitle" itemprop="name">What is the molecular formula of a material with percentage composition #C:40.5%#, #H:6.67%#, #O:53.33%#, and molecular mass of #180.0*g*mol^-1#?</h1> | null | C6H12O6 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>So if there are <mathjax>#100*g#</mathjax> of unknown compound, we can access the empirical formula given the percentage composition:</p>
<p><mathjax>#"Moles of carbon"=(40.0*g)/(12.011*g*mol^-1)=3.33*mol#</mathjax... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>This is a standard question, and as a routine we ASSUME a mass of <mathjax>#100*g#</mathjax> of unknown compound.......and get a molecular formula of <mathjax>#C_6H_12O_6#</mathjax>.</p></div>
</div>
</div>
<div class="a... | <article>
<h1 class="questionTitle" itemprop="name">What is the molecular formula of a material with percentage composition #C:40.5%#, #H:6.67%#, #O:53.33%#, and molecular mass of #180.0*g*mol^-1#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Br... | What is the molecular formula of a material with percentage composition #C:40.5%#, #H:6.67%#, #O:53.33%#, and molecular mass of #180.0*g*mol^-1#? | null |
61 | aabe432e-6ddd-11ea-ba2f-ccda262736ce | https://socratic.org/questions/what-is-the-molarity-of-a-500-0-ml-solution-containing-0-75-moles-of-solute | 1.50 M | start physical_unit 8 8 molarity mol/l qc_end physical_unit 8 8 6 7 volume qc_end physical_unit 13 13 10 11 mole qc_end end | [{"type":"physical unit","value":"Molarity [OF] the solution [IN] M"}] | [{"type":"physical unit","value":"1.50 M"}] | [{"type":"physical unit","value":"Volume [OF] the solution [=] \\pu{500.0 mL}"},{"type":"physical unit","value":"Mole [OF] solute [=] \\pu{0.75 moles}"}] | <h1 class="questionTitle" itemprop="name">What is the molarity of a 500.0 mL solution containing 0.75 moles of solute? </h1> | null | 1.50 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/solutions-and-their-behavior/molarity">Molarity</a> of a solution is the mumber of moles per litre. You have 0.75 moles in 500 ml. Therefore, you have 0.75 moles / 0.5 litre,... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>1.5 M</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/solutions-and-their-behavior/molarity">Molar... | <article>
<h1 class="questionTitle" itemprop="name">What is the molarity of a 500.0 mL solution containing 0.75 moles of solute? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcr... | What is the molarity of a 500.0 mL solution containing 0.75 moles of solute? | null |
62 | ace0fc68-6ddd-11ea-bb71-ccda262736ce | https://socratic.org/questions/a-mole-of-o-atoms-contains-how-many-atoms | 6.02 × 10^23 | start physical_unit 3 4 number none qc_end end | [{"type":"physical unit","value":"Number [OF] O atoms"}] | [{"type":"physical unit","value":"6.02 × 10^23"}] | [{"type":"physical unit","value":"Mole [OF] O atoms [=] \\pu{1 mole}"}] | <h1 class="questionTitle" itemprop="name">A mole of O atoms contains how many atoms?</h1> | null | 6.02 × 10^23 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>One mole of any substance contains one Avogadro's Number of particles. Avogadro's Number = <mathjax>#6.02xx10^23#</mathjax> particle units</p></div>
</div>
</div> | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#6.02xx10^23#</mathjax> Oxygen atoms</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>One mole of any substance contains one Avoga... | <article>
<h1 class="questionTitle" itemprop="name">A mole of O atoms contains how many atoms?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry</sp... | A mole of O atoms contains how many atoms? | null |
63 | a9e1faad-6ddd-11ea-9151-ccda262736ce | https://socratic.org/questions/how-many-grams-in-113-5-moles-of-lino-3 | 7830 grams | start physical_unit 7 7 mass g qc_end physical_unit 7 7 4 5 mole qc_end end | [{"type":"physical unit","value":"Mass [OF] LiNO3 [IN] grams"}] | [{"type":"physical unit","value":"7830 grams"}] | [{"type":"physical unit","value":"Mole [OF] LiNO3 [=] \\pu{113.5 moles}"}] | <h1 class="questionTitle" itemprop="name">How many grams in 113.5 moles of #LiNO_3#?</h1> | null | 7830 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Determine the mass of one mole of <mathjax>#"LiNO"_3"#</mathjax>. This is its molar mass. The molar mass of <mathjax>#"LiNO"_3"#</mathjax> is <mathjax>#"68.944 g/mol"#</mathjax>.<br/>
<a href="https://pubchem.ncbi.... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"113.5 mol LiNO"_3"#</mathjax> has a mass of <mathjax>#"7830 g"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Dete... | <article>
<h1 class="questionTitle" itemprop="name">How many grams in 113.5 moles of #LiNO_3#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry</sp... | How many grams in 113.5 moles of #LiNO_3#? | null |
64 | a9664dca-6ddd-11ea-ac17-ccda262736ce | https://socratic.org/questions/an-naoh-solution-contains-1-90-mol-of-naoh-and-its-concentration-is-0-555-m-what | 3.42 L | start physical_unit 1 2 volume l qc_end physical_unit 1 1 4 5 mole qc_end physical_unit 1 2 12 13 concentration qc_end end | [{"type":"physical unit","value":"Volume [OF] NaOH solution [IN] L"}] | [{"type":"physical unit","value":"3.42 L"}] | [{"type":"physical unit","value":"Mole [OF] NaOH [=] \\pu{1.90 mol}"},{"type":"physical unit","value":"Concentration [OF] NaOH solution [=] \\pu{0.555 M}"}] | <h1 class="questionTitle" itemprop="name">An #NaOH# solution contains 1.90 mol of #NaOH#, and its concentration is 0.555 M. What is its volume?</h1> | null | 3.42 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>First rewrite the <a href="http://socratic.org/chemistry/solutions-and-their-behavior/molarity">molarity</a> of NaOH, <mathjax>#"0.555 M"#</mathjax>, as <mathjax>#"0.555 mol/L"#</mathjax>.</p>
<p>Next divide the gi... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The volume is <mathjax>#"3.42 L"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>First rewrite the <a href="http://socratic.or... | <article>
<h1 class="questionTitle" itemprop="name">An #NaOH# solution contains 1.90 mol of #NaOH#, and its concentration is 0.555 M. What is its volume?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="ur... | An #NaOH# solution contains 1.90 mol of #NaOH#, and its concentration is 0.555 M. What is its volume? | null |
65 | a8f641cd-6ddd-11ea-967e-ccda262736ce | https://socratic.org/questions/595e6a0511ef6b6157c52c27 | 85 g | start physical_unit 12 12 mass g qc_end physical_unit 5 5 1 2 mass qc_end physical_unit 18 18 16 16 w/w qc_end substance 12 12 qc_end end | [{"type":"physical unit","value":"Mass [OF] water [IN] g"}] | [{"type":"physical unit","value":"85 g"}] | [{"type":"physical unit","value":"Mass [OF] solute [=] \\pu{15 g}"},{"type":"physical unit","value":"w/w [OF] solution [=] \\pu{15%}"},{"type":"substance name","value":"Water"}] | <h1 class="questionTitle" itemprop="name">A #15*g# mass of solute was dissolved in a mass of water to give a #15%# #"w/w"# solution. What was the mass of water used to make the solution? </h1> | null | 85 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#%"solution"="Mass of solute"/"Mass of solvent and solute"xx100%#</mathjax></p>
<p><mathjax>#=(15*g)/(15.0*g+85.0*g)xx100%=15%w/w#</mathjax></p>
<p>Here we define <mathjax>#w/w%#</mathjax>......There are o... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>Why.........<mathjax>#85*g#</mathjax> of water.........</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#%"solution"="Mass of sol... | <article>
<h1 class="questionTitle" itemprop="name">A #15*g# mass of solute was dissolved in a mass of water to give a #15%# #"w/w"# solution. What was the mass of water used to make the solution? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/B... | A #15*g# mass of solute was dissolved in a mass of water to give a #15%# #"w/w"# solution. What was the mass of water used to make the solution? | null |
66 | ac5f0d6e-6ddd-11ea-b32e-ccda262736ce | https://socratic.org/questions/what-is-the-ph-of-a-043-m-hcl-solution | 1.37 | start physical_unit 8 9 ph none qc_end physical_unit 8 9 6 7 molarity qc_end end | [{"type":"physical unit","value":"pH [OF] HCl solution"}] | [{"type":"physical unit","value":"1.37"}] | [{"type":"physical unit","value":"Molarity [OF] HCl solution [=] \\pu{0.043 M}"}] | <h1 class="questionTitle" itemprop="name">What is the pH of a .043 M #HCl# solution?</h1> | null | 1.37 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/acids-and-bases/the-ph-concept">pH</a> = <mathjax>#-lg(0.043)#</mathjax> = 1.34</p>
<p>pH is 1.34.</p></div>
</div>
</div> | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#-lg(H_(Cation))#</mathjax> </p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/acids-and-ba... | <article>
<h1 class="questionTitle" itemprop="name">What is the pH of a .043 M #HCl# solution?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry</sp... | What is the pH of a .043 M #HCl# solution? | null |
67 | a9b4864b-6ddd-11ea-80f4-ccda262736ce | https://socratic.org/questions/how-many-carbon-atoms-are-represented-by-c-2h-5-2nch-3 | 5 | start physical_unit 2 3 number none qc_end chemical_equation 7 7 qc_end end | [{"type":"physical unit","value":"Number [OF] carbon atoms"}] | [{"type":"physical unit","value":"5"}] | [{"type":"chemical equation","value":"(C2H5)2NCH3"}] | <h1 class="questionTitle" itemprop="name">How many carbon atoms are represented by #(C_2H_5)_2NCH_3#?</h1> | null | 5 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Looking at the formula, clearly there are <mathjax>#"5 carbon atoms"#</mathjax>, <mathjax>#"1 nitrogen atom"#</mathjax>, and <mathjax>#"13 hydrogen atoms"#</mathjax>. All I did was expand the <a href="https://socr... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>There are <mathjax>#"5 carbon atoms"#</mathjax> in <mathjax>#"diethylmethylamine"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"... | <article>
<h1 class="questionTitle" itemprop="name">How many carbon atoms are represented by #(C_2H_5)_2NCH_3#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="tit... | How many carbon atoms are represented by #(C_2H_5)_2NCH_3#? | null |
68 | a91c20ac-6ddd-11ea-805e-ccda262736ce | https://socratic.org/questions/what-is-the-oh-for-a-solution-at-25-c-that-has-a-h-3o-of-5-36-times-10-5 | 1.87 × 10^(-10) M | start physical_unit 5 6 [oh-] mol/l qc_end physical_unit 5 6 15 18 [h3o+] qc_end physical_unit 5 6 8 9 temperature qc_end end | [{"type":"physical unit","value":"[OH−] [OF] a solution [IN] M"}] | [{"type":"physical unit","value":"1.87 × 10^(-10) M"}] | [{"type":"physical unit","value":"[H3O+] [OF] a solution [=] \\pu{5.36 × 10^(-5) M}"},{"type":"physical unit","value":"Temperature [OF] a solution [=] \\pu{25 ℃}"}] | <h1 class="questionTitle" itemprop="name">What is the #[OH^-]# for a solution at 25°C that has a #[H_3O^+]# of #5.36 times 10^-5#?</h1> | null | 1.87 × 10^(-10) M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Given.......</p>
<p><mathjax>#2H_2O(l) rightleftharpoonsH_3O^+ + HO^-#</mathjax></p>
<p><mathjax>#K_w'=([H_3O^+][HO^-])/([H_2O(l)])#</mathjax></p>
<p>Because <mathjax>#[H_2O]#</mathjax> is so large, we remove it fr... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#[HO^-]=1.87xx10^-10*mol*L^-1#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Given.......</p>
<p><mathjax>#2H_2O(l) r... | <article>
<h1 class="questionTitle" itemprop="name">What is the #[OH^-]# for a solution at 25°C that has a #[H_3O^+]# of #5.36 times 10^-5#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span cla... | What is the #[OH^-]# for a solution at 25°C that has a #[H_3O^+]# of #5.36 times 10^-5#? | null |
69 | aa8ba6f8-6ddd-11ea-9824-ccda262736ce | https://socratic.org/questions/what-is-the-molarity-of-a-solution-of-ammonium-chloride-prepared-by-diluting-50- | 0.09 M | start physical_unit 19 20 molarity mol/l qc_end physical_unit 19 20 17 18 molarity qc_end physical_unit 19 20 13 14 volume qc_end physical_unit 19 20 22 23 volume qc_end end | [{"type":"physical unit","value":"Molarity2 [OF] NH4Cl solution [IN] M"}] | [{"type":"physical unit","value":"0.09 M"}] | [{"type":"physical unit","value":"Molarity1 [OF] NH4Cl solution [=] \\pu{3.79 M}"},{"type":"physical unit","value":"Volume1 [OF] NH4Cl solution [=] \\pu{50.00 mL}"},{"type":"physical unit","value":"Volume2 [OF] NH4Cl solution [=] \\pu{2.00 L}"}] | <h1 class="questionTitle" itemprop="name">What is the molarity of a solution of ammonium chloride prepared by diluting 50.00 mL of a 3.79 M #NH_4Cl# solution to 2.00 L?</h1> | null | 0.09 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>How many moles of <a href="https://socratic.org/chemistry/solutions-and-their-behavior/solute">solute</a> did you start with?</p>
<p>Use <mathjax>#M = n/V#</mathjax></p>
<p>Where M is <a href="https://socratic.org/... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>0.09475 moles per litre.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>How many moles of <a href="https://socratic.org/chemistry/solutio... | <article>
<h1 class="questionTitle" itemprop="name">What is the molarity of a solution of ammonium chloride prepared by diluting 50.00 mL of a 3.79 M #NH_4Cl# solution to 2.00 L?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href=... | What is the molarity of a solution of ammonium chloride prepared by diluting 50.00 mL of a 3.79 M #NH_4Cl# solution to 2.00 L? | null |
70 | a8d86d40-6ddd-11ea-9a24-ccda262736ce | https://socratic.org/questions/599907b87c014904aab5606f | 2 | start physical_unit 6 6 ph none qc_end physical_unit 13 13 8 9 volume qc_end physical_unit 13 13 15 16 molarity qc_end physical_unit 18 18 8 9 volume qc_end physical_unit 18 18 20 21 molarity qc_end end | [{"type":"physical unit","value":"pH [OF] solution"}] | [{"type":"physical unit","value":"2"}] | [{"type":"physical unit","value":"Volume [OF] HCl(aq) [=] \\pu{100 mL}"},{"type":"physical unit","value":"Molarity [OF] HCl(aq) [=] \\pu{0.20 mol/L}"},{"type":"physical unit","value":"Volume [OF] NaOH(aq) [=] \\pu{100 mL}"},{"type":"physical unit","value":"Molarity [OF] NaOH(aq) [=] \\pu{0.18 mol/L}"}] | <h1 class="questionTitle" itemprop="name">What is the #pH# of a solution comprising #100*mL# volumes EACH of #HCl(aq)# at #0.20*mol*L^-1# and #NaOH(aq)# at #0.18*mol*L^-1#?</h1> | null | 2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We interrogate the chemical reaction....</p>
<p><mathjax>#HCl(aq) + NaOH(aq) rarr NaCl(aq) + H_2O(l)#</mathjax>.</p>
<p><mathjax>#"Moles of HCl(aq)"=100xx10^-3*Lxx0.2*mol*L^-1=2.0xx10^-2*mol#</mathjax>.</p>
<p><mat... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#pH-=2#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We interrogate the chemical reaction....</p>
<p><mathjax>#HCl(a... | <article>
<h1 class="questionTitle" itemprop="name">What is the #pH# of a solution comprising #100*mL# volumes EACH of #HCl(aq)# at #0.20*mol*L^-1# and #NaOH(aq)# at #0.18*mol*L^-1#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a h... | What is the #pH# of a solution comprising #100*mL# volumes EACH of #HCl(aq)# at #0.20*mol*L^-1# and #NaOH(aq)# at #0.18*mol*L^-1#? | null |
71 | ac5c1a06-6ddd-11ea-8619-ccda262736ce | https://socratic.org/questions/a-compound-is-53-31-c-11-18-h-and-35-51-o-by-mass-what-is-its-empirical-formula | C2H5O | start chemical_formula qc_end end | [{"type":"other","value":"Chemical Formula [OF] the compound [IN] empirical"}] | [{"type":"chemical equation","value":"C2H5O"}] | [{"type":"physical unit","value":"Percent by mass [OF] C in the compound [=] \\pu{53.31%}"},{"type":"physical unit","value":"Percent by mass [OF] H in the compound [=] \\pu{11.18%}"},{"type":"physical unit","value":"Percent by mass [OF] O in the compound [=] \\pu{35.51%}"}] | <h1 class="questionTitle" itemprop="name">A compound is 53.31% C, 11.18% H, and 35.51% O by mass. What is its empirical formula?</h1> | null | C2H5O | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The atomic weights:</p>
<ul>
<li>C - <a href="https://www.google.com/#q=atomic+weight+carbon" rel="nofollow">carbon</a> - 12.0107</li>
<li>H - <a href="https://www.google.com/#q=atomic+weight+hydrogen" rel="nofoll... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#C_2H_5O_1#</mathjax> - ethanol</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The atomic weights:</p>
<ul>
<li>C - <a href="htt... | <article>
<h1 class="questionTitle" itemprop="name">A compound is 53.31% C, 11.18% H, and 35.51% O by mass. What is its empirical formula?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class... | A compound is 53.31% C, 11.18% H, and 35.51% O by mass. What is its empirical formula? | null |
72 | acde559c-6ddd-11ea-8e9e-ccda262736ce | https://socratic.org/questions/to-what-volume-should-you-dilute-55-ml-of-a-11-m-stock-hno-3-solution-to-obtain- | 4.42 L | start physical_unit 13 14 volume l qc_end physical_unit 12 14 6 7 volume qc_end physical_unit 12 14 10 11 molarity qc_end physical_unit 13 14 18 19 molarity qc_end end | [{"type":"physical unit","value":"Volume2 [OF] HNO3 solution [IN] L"}] | [{"type":"physical unit","value":"4.42 L"}] | [{"type":"physical unit","value":"Volume1 [OF] stock HNO3 solution [=] \\pu{55 mL}"},{"type":"physical unit","value":"Molarity1 [OF] stock HNO3 solution [=] \\pu{11 M}"},{"type":"physical unit","value":"Molarity2 [OF] HNO3 solution [=] \\pu{0.137 M}"}] | <h1 class="questionTitle" itemprop="name">To what volume should you dilute 55 mL of a 11 M stock #HNO_3# solution to obtain a 0.137 M #HNO_3# solution?</h1> | null | 4.42 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/solutions-and-their-behavior/molarity">Molarity</a> <mathjax>#("M")#</mathjax> represents the concentration of a solution in moles of <a href="https://socratic.org/chemistry/... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>You need to dilute the given volume of stock solution to <mathjax>#"4.4 L"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a ... | <article>
<h1 class="questionTitle" itemprop="name">To what volume should you dilute 55 mL of a 11 M stock #HNO_3# solution to obtain a 0.137 M #HNO_3# solution?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" item... | To what volume should you dilute 55 mL of a 11 M stock #HNO_3# solution to obtain a 0.137 M #HNO_3# solution? | null |
73 | a96c4d34-6ddd-11ea-8139-ccda262736ce | https://socratic.org/questions/what-is-the-specific-heat-of-a-substance-if-1560-cal-are-required-to-raise-the-t | 0.33 cal/(g * ℃) | start physical_unit 6 7 specific_heat cal/(g_·_°c) qc_end physical_unit 6 7 9 10 energy qc_end physical_unit 6 7 23 24 temperature qc_end physical_unit 6 7 19 20 mass qc_end end | [{"type":"physical unit","value":"Specific heat [OF] a substance [IN] cal/(g * ℃)"}] | [{"type":"physical unit","value":"0.33 cal/(g * ℃)"}] | [{"type":"physical unit","value":"Required energy [OF] a substance [=] \\pu{1560 cal}"},{"type":"physical unit","value":"Raised temperature [OF] a substance [=] \\pu{15 ℃}"},{"type":"physical unit","value":"Mass [OF] a substance sample [=] \\pu{312 g}"}] | <h1 class="questionTitle" itemprop="name">What is the specific heat of a substance if 1560 cal are required to raise the temperature of a 312-g sample by 15° C?</h1> | null | 0.33 cal/(g * ℃) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The amount of heat required is determined from the formula</p>
<p><mathjax>#q = mcΔT#</mathjax>,</p>
<p>where</p>
<ul>
<li><mathjax>#q#</mathjax> is the amount of heat transferred</li>
<li... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The <a href="http://socratic.org/chemistry/thermochemistry/specific-heat">specific heat</a> capacity of the substance is <mathjax>#"0.33 cal·g"^"-1""°C"^"-1"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescript... | <article>
<h1 class="questionTitle" itemprop="name">What is the specific heat of a substance if 1560 cal are required to raise the temperature of a 312-g sample by 15° C?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemis... | What is the specific heat of a substance if 1560 cal are required to raise the temperature of a 312-g sample by 15° C? | null |
74 | aa4b0bba-6ddd-11ea-96fd-ccda262736ce | https://socratic.org/questions/59b73a337c014903b4ce4fd8 | 1154.59 kJ | start physical_unit 10 10 energy kj qc_end physical_unit 10 10 7 8 mass qc_end physical_unit 12 12 14 15 temperature qc_end physical_unit 10 10 18 21 specific_heat_capacity qc_end end | [{"type":"physical unit","value":"Required energy [OF] water [IN] kJ"}] | [{"type":"physical unit","value":"1154.59 kJ"}] | [{"type":"physical unit","value":"Mass [OF] water [=] \\pu{429 g}"},{"type":"physical unit","value":"Temperature [OF] steam [=] \\pu{156 ℃}"},{"type":"physical unit","value":"C [OF] water [=] \\pu{4.184 J/(℃ * mol)}"},{"type":"physical unit","value":"C [OF] vapour [=] \\pu{2.078 J/(℃ * mol)}"},{"type":"physical unit","... | <h1 class="questionTitle" itemprop="name">How much energy is required to convert 429 g of water to steam at 156 °C?</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p><mathjax>#C_text(water) = "4.184 J/(°C·mol)"; C_text(vapour) = "2.078 J/(°C·mol)"; Δ_text(vap)H = "2257 J/g"#</mathjax></p></div>
</h2>
</div>
</div> | 1154.59 kJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We will be using the formula: <mathjax>#mcDeltaT#</mathjax>, where:<br/>
=> <mathjax>#m#</mathjax> is the mass of the object in grams. <br/>
=> <mathjax>#c#</mathjax> is the <a href="https://socratic.org/chem... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#~~1155(kJ)/(g*^oC)#</mathjax>. </p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We will be using the formula: <mathjax>#mcDelta... | <article>
<h1 class="questionTitle" itemprop="name">How much energy is required to convert 429 g of water to steam at 156 °C?</h1>
<div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p><mathjax>#C_text(water) = "4.184 J/(°C·mo... | How much energy is required to convert 429 g of water to steam at 156 °C? |
#C_text(water) = "4.184 J/(°C·mol)"; C_text(vapour) = "2.078 J/(°C·mol)"; Δ_text(vap)H = "2257 J/g"#
|
75 | ab23ab65-6ddd-11ea-8790-ccda262736ce | https://socratic.org/questions/gas-samples-a-b-c-are-contained-at-stp-partial-pressure-of-sample-a-is-38-0-kpa- | 44.3 kPa | start physical_unit 29 30 partial_pressure kpa qc_end c_other STP qc_end physical_unit 12 13 15 16 partial_pressure qc_end physical_unit 18 19 21 22 partial_pressure qc_end end | [{"type":"physical unit","value":"Partial pressure [OF] sample C [IN] kPa"}] | [{"type":"physical unit","value":"44.3 kPa"}] | [{"type":"other","value":"STP"},{"type":"physical unit","value":"Partial pressure [OF] sample A [=] \\pu{38.0 kPa}"},{"type":"physical unit","value":"Partial pressure [OF] sample B [=] \\pu{19.0 kPa}"}] | <h1 class="questionTitle" itemprop="name">Gas samples A, B, C are contained at STP. Partial pressure of sample A is 38.0 kPa and sample B is 19.0 kPa. What is the partial pressure of sample C?</h1> | null | 44.3 kPa | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>If the mixture of gases A, B and C is contained at STP, this means that the total pressure is 1 atm.</p>
<p>Note that <mathjax>#1atm=101.325kPa#</mathjax></p>
<p>According to Dalton's law, the total pressure of a m... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#=>P_C=44.3kPa#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>If the mixture of gases A, B and C is contained at S... | <article>
<h1 class="questionTitle" itemprop="name">Gas samples A, B, C are contained at STP. Partial pressure of sample A is 38.0 kPa and sample B is 19.0 kPa. What is the partial pressure of sample C?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.o... | Gas samples A, B, C are contained at STP. Partial pressure of sample A is 38.0 kPa and sample B is 19.0 kPa. What is the partial pressure of sample C? | null |
76 | abd0a0b1-6ddd-11ea-abdc-ccda262736ce | https://socratic.org/questions/572c0c3511ef6b72467484b1 | 3 N2H4(g) + 4 ClO3-(aq) -> 6 NO(g) + 6 H2O(l) + 4 Cl-(aq) | start chemical_equation qc_end substance 2 2 qc_end substance 4 4 qc_end chemical_equation 7 7 qc_end substance 9 10 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"3 N2H4(g) + 4 ClO3-(aq) -> 6 NO(g) + 6 H2O(l) + 4 Cl-(aq)"}] | [{"type":"substance name","value":"Chlorate"},{"type":"substance name","value":"Hydrazine"},{"type":"chemical equation","value":"NO"},{"type":"substance name","value":"Chloride anion"}] | <h1 class="questionTitle" itemprop="name">How does #"chlorate"# oxidize hydrazine to give #NO# and chloride anion?</h1> | null | 3 N2H4(g) + 4 ClO3-(aq) -> 6 NO(g) + 6 H2O(l) + 4 Cl-(aq) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This is one equation for the oxidation of hydrazine to nitrous oxide. It also accords with your question. Quite clearly, the equation should have appeared with the question.</p></div>
</div>
</div> | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#3N_2H_4(g) + 4ClO_3^(-)(aq) rarr 6NO(g) + 6H_2O(l) + 4Cl^(-)(aq)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This... | <article>
<h1 class="questionTitle" itemprop="name">How does #"chlorate"# oxidize hydrazine to give #NO# and chloride anion?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" ... | How does #"chlorate"# oxidize hydrazine to give #NO# and chloride anion? | null |
77 | a8f5f45b-6ddd-11ea-a63d-ccda262736ce | https://socratic.org/questions/if-10-drops-of-pyruvic-acid-hc-3h-3o-3-are-titrated-with-20-drops-of-0-25-m-naoh | 0.50 M | start physical_unit 22 25 molarity mol/l qc_end physical_unit 15 15 13 14 molarity qc_end physical_unit 15 15 10 11 volume qc_end physical_unit 6 6 1 2 volume qc_end end | [{"type":"physical unit","value":"Molar concentration [OF] the pyruvic acid solution [IN] M"}] | [{"type":"physical unit","value":"0.50 M"}] | [{"type":"physical unit","value":"Molarity [OF] NaOH [=] \\pu{0.25 M}"},{"type":"physical unit","value":"Volume [OF] NaOH [=] \\pu{20 drops}"},{"type":"physical unit","value":"Volume [OF] HC3H3O3 [=] \\pu{10 drops}"}] | <h1 class="questionTitle" itemprop="name">If 10 drops of pyruvic acid (#HC_3H_3O_3#) are titrated with 20 drops of 0.25 M #NaOH#, what is the molar concentration of the pyruvic acid solution?</h1> | null | 0.50 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that you don't need to know what a <em>drop</em> means in terms of volume, all you need to do is focus on the fact that you need <strong>twice as many</strong> drops of sodium hydroxide solution th... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"0.50 M"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that you don't need to know what a <em>drop... | <article>
<h1 class="questionTitle" itemprop="name">If 10 drops of pyruvic acid (#HC_3H_3O_3#) are titrated with 20 drops of 0.25 M #NaOH#, what is the molar concentration of the pyruvic acid solution?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.or... | If 10 drops of pyruvic acid (#HC_3H_3O_3#) are titrated with 20 drops of 0.25 M #NaOH#, what is the molar concentration of the pyruvic acid solution? | null |
78 | ab1bc978-6ddd-11ea-9816-ccda262736ce | https://socratic.org/questions/when-2-moles-of-h-2-g-and-1-mole-of-o-2-g-react-to-give-liquid-water-572-kj-of-h | 276 kJ | start physical_unit 13 14 thermochemical_equation kj qc_end physical_unit 4 4 1 2 mole qc_end physical_unit 9 9 6 7 mole qc_end chemical_equation 20 26 qc_end physical_unit 13 14 6 7 mole qc_end end | [{"type":"physical unit","value":"Themochemical eq. [OF] liquid water [IN] kJ"}] | [{"type":"physical unit","value":"276 kJ"}] | [{"type":"physical unit","value":"Mole [OF] H2(g) [=] \\pu{2 moles}"},{"type":"physical unit","value":"Mole [OF] O2(g) [=] \\pu{1 mole}"},{"type":"physical unit","value":"Evolved heat [OF] the reaction [=] \\pu{572 kJ}"},{"type":"chemical equation","value":"2 H2(g) + O2(g) -> 2 H2O(l)"},{"type":"physical unit","value":... | <h1 class="questionTitle" itemprop="name">When 2 moles of #H_2(g)# and 1 mole of #O_2(g)# react to give liquid water, 572 kJ of heat evolve.
#2H_2(g)# + #O_2(g)# #rarr# #2H_2O(l)# ; #DeltaH# = -572 kJ
a) What is the themochemical eq. for 1 mole of liquid water?
</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>b) Write the reverse thermochemical equation in which 1 mole of liquid water disassociates into hydrogen and oxygen gas.<br/>
Thank you so much for your help. :)</p></div>
... | 276 kJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You know that when <mathjax>#2#</mathjax> <strong>moles</strong> of hydrogen gas react with <mathjax>#1#</mathjax> <strong>mole</strong> of oxygen gas, you get <mathjax>#2#</mathjax> <strong>moles</strong> of water... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"H"_ (2(g)) + 1/2"O"_ (2(g)) -> "H"_ 2"O"_ ((l))" " DeltaH = -"276 kJ"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown... | <article>
<h1 class="questionTitle" itemprop="name">When 2 moles of #H_2(g)# and 1 mole of #O_2(g)# react to give liquid water, 572 kJ of heat evolve.
#2H_2(g)# + #O_2(g)# #rarr# #2H_2O(l)# ; #DeltaH# = -572 kJ
a) What is the themochemical eq. for 1 mole of liquid water?
</h1>
<div class="questionDetailsContainer">
<d... | When 2 moles of #H_2(g)# and 1 mole of #O_2(g)# react to give liquid water, 572 kJ of heat evolve.
#2H_2(g)# + #O_2(g)# #rarr# #2H_2O(l)# ; #DeltaH# = -572 kJ
a) What is the themochemical eq. for 1 mole of liquid water?
|
b) Write the reverse thermochemical equation in which 1 mole of liquid water disassociates into hydrogen and oxygen gas.
Thank you so much for your help. :)
|
79 | a9fb9f8a-6ddd-11ea-9658-ccda262736ce | https://socratic.org/questions/if-26-03-g-of-water-showed-a-temperature-increase-of-102-c-upon-addition-of-hot- | 11.15 kJ | start physical_unit 4 4 heat_energy kj qc_end physical_unit 4 4 1 2 mass qc_end physical_unit 4 4 10 11 temperature qc_end end | [{"type":"physical unit","value":"Heat change [OF] water [IN] kJ"}] | [{"type":"physical unit","value":"11.15 kJ"}] | [{"type":"physical unit","value":"Mass [OF] water [=] \\pu{26.03 g}"},{"type":"physical unit","value":"Increased temperature [OF] water [=] \\pu{102 ℃}"}] | <h1 class="questionTitle" itemprop="name">If 26.03 g of water showed a temperature increase of 102°C upon addition of hot metal, what is the heat change for the water?</h1> | null | 11.15 kJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>I would go for:<br/>
<mathjax>#Q=mcDeltaT#</mathjax><br/>
where:<br/>
<mathjax>#Q=#</mathjax> heat gained or lost;<br/>
<mathjax>#m=#</mathjax> mass;<br/>
<mathjax>#c=#</mathjax> heat capacity of the specific mater... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>I found <mathjax>#11kJ#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>I would go for:<br/>
<mathjax>#Q=mcDeltaT#</mathjax><br/... | <article>
<h1 class="questionTitle" itemprop="name">If 26.03 g of water showed a temperature increase of 102°C upon addition of hot metal, what is the heat change for the water?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="... | If 26.03 g of water showed a temperature increase of 102°C upon addition of hot metal, what is the heat change for the water? | null |
80 | abfd987a-6ddd-11ea-b7c9-ccda262736ce | https://socratic.org/questions/an-exothermic-reaction-releases-86-5-kj-how-many-kilocalories-of-energy-are-rele | 20.67 kilocalories | start physical_unit 1 2 heat_energy kcal qc_end physical_unit 1 2 4 5 heat_energy qc_end end | [{"type":"physical unit","value":"Released energy [OF] the exothermic reaction [IN] kilocalories"}] | [{"type":"physical unit","value":"20.67 kilocalories"}] | [{"type":"physical unit","value":"Released energy [OF] the exothermic reaction [=] \\pu{86.5 kJ}"}] | <h1 class="questionTitle" itemprop="name">An exothermic reaction releases 86.5 kJ. How many kilocalories of energy are released?</h1> | null | 20.67 kilocalories | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This problem is just a unit conversion, so you need to know the definition of a calorie. A calorie is a unit of energy equal to 4.184 J. This is the energy required to heat up one gram of water by one degree celsiu... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#1 " kJ"=0.239" kcal"#</mathjax></p>
<p><mathjax>#86.5 " kJ"=86.5*0.239=20.7" kcal"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class=... | <article>
<h1 class="questionTitle" itemprop="name">An exothermic reaction releases 86.5 kJ. How many kilocalories of energy are released?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class... | An exothermic reaction releases 86.5 kJ. How many kilocalories of energy are released? | null |
81 | a989abdc-6ddd-11ea-b9f0-ccda262736ce | https://socratic.org/questions/water-2290-g-is-heated-until-it-just-begins-to-boil-if-the-water-absorbs-5-47x10 | 42.86 ℃ | start physical_unit 12 13 temperature °c qc_end c_other OTHER qc_end physical_unit 0 0 1 2 mass qc_end physical_unit 12 13 15 18 heat_energy qc_end end | [{"type":"physical unit","value":"Temperature1 [OF] the water [IN] ℃"}] | [{"type":"physical unit","value":"42.86 ℃"}] | [{"type":"other","value":"Water is heated until it just begins to boil."},{"type":"physical unit","value":"Mass [OF] water [=] \\pu{2290 g}"},{"type":"physical unit","value":"Absorbed heat [OF] the water [=] \\pu{5.47 × 10^5 J}"}] | <h1 class="questionTitle" itemprop="name">Water (2290 g) is heated until it just begins to boil. If the water absorbs #5.47xx10^5 J# of heat in the process what was the initial temperature of the water?</h1> | null | 42.86 ℃ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that the problem is providing you with the amount of heat needed to raise the temperature of a given sample of water from an initial temperature to its <strong>boiling point</strong>, i.e. to <math... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#42.9^@"C"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that the problem is providing you with the... | <article>
<h1 class="questionTitle" itemprop="name">Water (2290 g) is heated until it just begins to boil. If the water absorbs #5.47xx10^5 J# of heat in the process what was the initial temperature of the water?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vo... | Water (2290 g) is heated until it just begins to boil. If the water absorbs #5.47xx10^5 J# of heat in the process what was the initial temperature of the water? | null |
82 | a982f9ac-6ddd-11ea-a94d-ccda262736ce | https://socratic.org/questions/once-ignited-it-will-produce-120-cubic-feet-of-o-2-at-0-5-psi-enough-to-support- | 7.71 × 10^5 g | start physical_unit 29 29 mass g qc_end physical_unit 9 9 11 12 pressure qc_end physical_unit 9 9 5 7 volume qc_end physical_unit 42 43 16 16 number qc_end physical_unit 20 21 45 46 temperature qc_end c_other OTHER qc_end chemical_equation 62 66 qc_end end | [{"type":"physical unit","value":"Mass [OF] NaClO3 [IN] g"}] | [{"type":"physical unit","value":"7.71 × 10^5 g"}] | [{"type":"physical unit","value":"Number [OF] people [=] \\pu{100}"},{"type":"physical unit","value":"Pressure [OF] O2 [=] \\pu{0.5 psi}"},{"type":"physical unit","value":"Volume [OF] O2 [=] \\pu{120 cubic feet}"},{"type":"physical unit","value":"Number [OF] crew members [=] \\pu{100}"},{"type":"physical unit","value":... | <h1 class="questionTitle" itemprop="name">Once ignited, it will produce 120 cubic feet of #O_2# at 0.5 psi, enough to support 100 persons. After balancing the equation, how do you compute the mass of #NaClO_3# required to generate the moles of gas needed to support the 100 crew members at 300K?</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>On submarines, chlorate candles are used to produce emergency oxygen. Once ignited, it decomposes via: <mathjax>#NaClO_3(s) -> NaCl(s) + O_2(g)#</mathjax>. </p></div>
... | 7.71 × 10^5 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Typically, this reaction is catalyzed by an oxygen transfer reagent, <mathjax>#MnO_2#</mathjax>. This is a very convenient preparation of laboratory oxygen (and also, as you say, on board a submarine or submersibl... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#NaClO_3(s) rarr NaCl(s) + 3/2O_2(g)uarr#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Typically, this reaction is c... | <article>
<h1 class="questionTitle" itemprop="name">Once ignited, it will produce 120 cubic feet of #O_2# at 0.5 psi, enough to support 100 persons. After balancing the equation, how do you compute the mass of #NaClO_3# required to generate the moles of gas needed to support the 100 crew members at 300K?</h1>
<div cla... | Once ignited, it will produce 120 cubic feet of #O_2# at 0.5 psi, enough to support 100 persons. After balancing the equation, how do you compute the mass of #NaClO_3# required to generate the moles of gas needed to support the 100 crew members at 300K? |
On submarines, chlorate candles are used to produce emergency oxygen. Once ignited, it decomposes via: #NaClO_3(s) -> NaCl(s) + O_2(g)#.
|
83 | aaeabe8a-6ddd-11ea-b6f4-ccda262736ce | https://socratic.org/questions/58d3dc28b72cff2e15eb8836 | 3.29 g | start physical_unit 19 20 mass g qc_end physical_unit 5 6 1 2 volume qc_end physical_unit 5 6 10 10 ph qc_end physical_unit 5 6 14 15 [nh3] qc_end end | [{"type":"physical unit","value":"Mass [OF] ammonium chloride [IN] g"}] | [{"type":"physical unit","value":"3.29 g"}] | [{"type":"physical unit","value":"Volume [OF] ammonia/ammonium buffer [=] \\pu{0.500 L}"},{"type":"physical unit","value":"pH [OF] ammonia/ammonium buffer [=] \\pu{9.15}"},{"type":"physical unit","value":"[NH3] [OF] ammonia/ammonium buffer [=] \\pu{0.10 mol/L}"}] | <h1 class="questionTitle" itemprop="name">An #0.500*L# volume of ammonia/ammonium buffer has #pH=9.15#. If #[NH_3]=0.10*mol*L^-1#, what MASS of ammonium chloride does this buffer contain?</h1> | null | 3.29 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Now for <mathjax>#"ammonium ion"#</mathjax> in water <mathjax>#pK_a=9.24#</mathjax></p>
<p>And thus, <mathjax>#9.15=9.24+log_10{[[NH_3]]/[[NH_4^+]]}#</mathjax></p>
<p>Clearly, <mathjax>#log_10{[[NH_3]]/[[NH_4^+]]}=... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>We use the buffer equation, <mathjax>#pH=pK_a+log_10{[[NH_3]]/[[NH_4^+]]}#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Now f... | <article>
<h1 class="questionTitle" itemprop="name">An #0.500*L# volume of ammonia/ammonium buffer has #pH=9.15#. If #[NH_3]=0.10*mol*L^-1#, what MASS of ammonium chloride does this buffer contain?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/B... | An #0.500*L# volume of ammonia/ammonium buffer has #pH=9.15#. If #[NH_3]=0.10*mol*L^-1#, what MASS of ammonium chloride does this buffer contain? | null |
84 | ad0ea5c6-6ddd-11ea-919a-ccda262736ce | https://socratic.org/questions/how-many-chloride-ions-are-there-in-4-50-mol-of-aluminum-chloride | 8.13 × 10^24 | start physical_unit 2 3 number none qc_end physical_unit 10 11 7 8 mole qc_end end | [{"type":"physical unit","value":"Number [OF] chloride ions"}] | [{"type":"physical unit","value":"8.13 × 10^24"}] | [{"type":"physical unit","value":"Mole [OF] aluminum chloride [=] \\pu{4.50 mol}"}] | <h1 class="questionTitle" itemprop="name">How many chloride ions are there in 4.50 mol of aluminum chloride?</h1> | null | 8.13 × 10^24 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>So <mathjax>#4.50#</mathjax> mol <mathjax>#AlCl_3harr3xx4.50=13.50#</mathjax> mol <mathjax>#Cl^-#</mathjax></p>
<p>1 mol contains <mathjax>#~~6.02xx10^23#</mathjax> particles, so the answer is:</p>
<p><mathjax>#n_(... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>1 mol aluminium chloride <mathjax>#AlCl_3#</mathjax> delivers 3 mol of <mathjax>#Cl^-#</mathjax> ions.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="... | <article>
<h1 class="questionTitle" itemprop="name">How many chloride ions are there in 4.50 mol of aluminum chloride?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itempr... | How many chloride ions are there in 4.50 mol of aluminum chloride? | null |
85 | abfb77a9-6ddd-11ea-95a3-ccda262736ce | https://socratic.org/questions/what-would-be-the-volume-of-6-00-g-of-helium-gas-at-stp | 33.6 L | start physical_unit 9 10 volume l qc_end physical_unit 9 10 6 7 mass qc_end c_other STP qc_end end | [{"type":"physical unit","value":"Volume [OF] helium gas [IN] L"}] | [{"type":"physical unit","value":"33.6 L"}] | [{"type":"physical unit","value":"Mass [OF] helium gas [=] \\pu{6.00 g}"},{"type":"other","value":"STP"}] | <h1 class="questionTitle" itemprop="name">What would be the volume of 6.00 g of helium gas at STP?</h1> | null | 33.6 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>To answer this question, we'll need to use the <a href="https://socratic.org/chemistry/the-behavior-of-gases/ideal-gas-law">Ideal Gas Law</a>:</p>
<p><mathjax>#pV = nRT#</mathjax>,<br/>
where <mathjax>#p#</mathjax>... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"33.6 L"#</mathjax>. </p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>To answer this question, we'll need to use the <a href="ht... | <article>
<h1 class="questionTitle" itemprop="name">What would be the volume of 6.00 g of helium gas at STP?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title"... | What would be the volume of 6.00 g of helium gas at STP? | null |
86 | ab68c69c-6ddd-11ea-bc13-ccda262736ce | https://socratic.org/questions/5789cfae11ef6b45dce62b76 | 0.56 mol/kg | start physical_unit 6 6 molality mol/kg qc_end physical_unit 12 12 9 10 mass qc_end physical_unit 18 18 15 16 mass qc_end end | [{"type":"physical unit","value":"Molality [OF] the solution [IN] mol/kg"}] | [{"type":"physical unit","value":"0.56 mol/kg"}] | [{"type":"physical unit","value":"Mass [OF] glucose [=] \\pu{3 g}"},{"type":"physical unit","value":"Mass [OF] water [=] \\pu{30 g}"}] | <h1 class="questionTitle" itemprop="name">What is the molality of a solution that contains #"3 g"# of glucose dissolved in #"30 g"# of water?</h1> | null | 0.56 mol/kg | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong><a href="https://socratic.org/chemistry/solutions-and-their-behavior/molality">Molality</a></strong> is all about <em>moles of <a href="https://socratic.org/chemistry/solutions-and-their-behavior/solute">so... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"0.6 mol kg"^(-1)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong><a href="https://socratic.org/chemistry/sol... | <article>
<h1 class="questionTitle" itemprop="name">What is the molality of a solution that contains #"3 g"# of glucose dissolved in #"30 g"# of water?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url"... | What is the molality of a solution that contains #"3 g"# of glucose dissolved in #"30 g"# of water? | null |
87 | a8d7a974-6ddd-11ea-9da6-ccda262736ce | https://socratic.org/questions/583d0f16b72cff28ad578588 | 3.99 | start physical_unit 6 6 percent none qc_end substance 8 8 qc_end substance 13 13 qc_end end | [{"type":"physical unit","value":"Rate [OF] effusion"}] | [{"type":"physical unit","value":"3.99"}] | [{"type":"substance name","value":"Hydrogen"},{"type":"substance name","value":"Oxygen"}] | <h1 class="questionTitle" itemprop="name">How fast is the rate of effusion of hydrogen compared to that of oxygen?</h1> | null | 3.99 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p><strong>Graham's Law of Effusion</strong> is:</p>
<blockquote>
<p><mathjax>#color(blue)(bar(ul(|color(white)(a/a) "Rate"_1/"Rate"_2 = sqrt(M_2/M_1)color(white)(a/a)|)))" "#</mathjax></p>
<... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"Rate"_text(H₂)/"Rate"_text(O₂) = 3.99#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p><str... | <article>
<h1 class="questionTitle" itemprop="name">How fast is the rate of effusion of hydrogen compared to that of oxygen?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" ... | How fast is the rate of effusion of hydrogen compared to that of oxygen? | null |
88 | a9b2ac7e-6ddd-11ea-8eb1-ccda262736ce | https://socratic.org/questions/what-is-the-formula-for-barium-fluoride | BaF2 | start chemical_formula qc_end substance 5 6 qc_end end | [{"type":"other","value":"Chemical Formula [OF] barium fluoride [IN] default"}] | [{"type":"chemical equation","value":"BaF2"}] | [{"type":"substance name","value":"Barium fluoride"}] | <h1 class="questionTitle" itemprop="name">What is the formula for barium fluoride? </h1> | null | BaF2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Barium is an alkaline earth, and commonly forms a <mathjax>#Ba^(2+)#</mathjax> cation. Given the fluoride ion, <mathjax>#F^-#</mathjax>, a neutral salt requires a formulation of <mathjax>#BaF_2#</mathjax>. </p></... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#BaF_2#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Barium is an alkaline earth, and commonly forms a <mathjax>#Ba^... | <article>
<h1 class="questionTitle" itemprop="name">What is the formula for barium fluoride? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry</spa... | What is the formula for barium fluoride? | null |
89 | a92d9c9c-6ddd-11ea-ac27-ccda262736ce | https://socratic.org/questions/how-do-you-write-the-formula-for-this-reaction-potassium-chlorate-decomposes-to- | 2 KClO3 -> 2 KCl + 3 O2 | start chemical_equation qc_end substance 9 10 qc_end substance 13 14 qc_end substance 16 17 qc_end end | [{"type":"other","value":"Chemical Equation [OF] this reaction"}] | [{"type":"chemical equation","value":"2 KClO3 -> 2 KCl + 3 O2"}] | [{"type":"substance name","value":"Potassium chlorate"},{"type":"substance name","value":"Potassium chloride"},{"type":"substance name","value":"Oxygen gas"}] | <h1 class="questionTitle" itemprop="name">How do you write the formula for this reaction: Potassium chlorate decomposes to potassium chloride and oxygen gas?</h1> | null | 2 KClO3 -> 2 KCl + 3 O2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Formula for Potassium chlorate is <mathjax>#KClO_3#</mathjax>.<br/>
Formula for Potassium chloride is <mathjax>#KCl.#</mathjax> <br/>
Formula for Oxygen gas as molecule is <mathjax>#O_2.#</mathjax></p>
<p><math... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>Reaction is <mathjax>#2KClO_3#</mathjax> <mathjax>#rarr#</mathjax> <mathjax>#2KCl#</mathjax> <mathjax>#+#</mathjax> <mathjax>#3O_2uarr.#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answer... | <article>
<h1 class="questionTitle" itemprop="name">How do you write the formula for this reaction: Potassium chlorate decomposes to potassium chloride and oxygen gas?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry... | How do you write the formula for this reaction: Potassium chlorate decomposes to potassium chloride and oxygen gas? | null |
90 | acf55fc8-6ddd-11ea-90ec-ccda262736ce | https://socratic.org/questions/what-is-the-molar-mass-of-k | 39.1 g/mol | start physical_unit 6 6 molar_mass g/mol qc_end chemical_equation 6 6 qc_end end | [{"type":"physical unit","value":"Molar mass [OF] K [IN] g/mol"}] | [{"type":"physical unit","value":"39.1 g/mol"}] | [{"type":"chemical equation","value":"K"}] | <h1 class="questionTitle" itemprop="name">What is the molar mass of #K#?</h1> | null | 39.1 g/mol | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The <strong>molar mass</strong> of a species is the mass of 1 mole of that substance in grams, and equates to its <strong>relative <a href="http://socratic.org/chemistry/a-first-introduction-to-matter/atomic-mass-a... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"molar mass"#</mathjax> <mathjax>#("K") = 39.1#</mathjax> <mathjax>#"g"#</mathjax> <mathjax>#"mol"^-1#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4... | <article>
<h1 class="questionTitle" itemprop="name">What is the molar mass of #K#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry</span>
</a>
</s... | What is the molar mass of #K#? | null |
91 | acbce1ed-6ddd-11ea-b5dd-ccda262736ce | https://socratic.org/questions/determine-the-volume-occupied-by-2-50-g-of-hydrogen-gas-at-a-pressure-of-828-mm- | 28.77 L | start physical_unit 8 9 volume l qc_end physical_unit 8 9 5 6 mass qc_end physical_unit 8 9 22 23 temperature qc_end physical_unit 8 9 14 17 pressure qc_end end | [{"type":"physical unit","value":"Volume [OF] hydrogen gas [IN] L"}] | [{"type":"physical unit","value":"28.77 L"}] | [{"type":"physical unit","value":"Mass [OF] hydrogen gas [=] \\pu{2.50 g}"},{"type":"physical unit","value":"Temperature [OF] hydrogen gas [=] \\pu{35.0 ℃}"},{"type":"physical unit","value":"Pressure [OF] hydrogen gas [=] \\pu{828 mm of mercury}"}] | <h1 class="questionTitle" itemprop="name">Determine the volume occupied by 2.50 g of hydrogen gas at a pressure of 828 mm of mercury and a temperature of 35.0 C ?</h1> | null | 28.77 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>It looks like you may not have converted the mass of <mathjax>#"H"_2"#</mathjax> to moles <mathjax>#(n)#</mathjax>. Also, you have the incorrect value for <mathjax>#R#</mathjax> because you are using mmHg as the pr... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The volume is <mathjax>#"28.8 L"#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>It looks like you may not have converted the ... | <article>
<h1 class="questionTitle" itemprop="name">Determine the volume occupied by 2.50 g of hydrogen gas at a pressure of 828 mm of mercury and a temperature of 35.0 C ?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chem... | Determine the volume occupied by 2.50 g of hydrogen gas at a pressure of 828 mm of mercury and a temperature of 35.0 C ? | null |
92 | abe652a0-6ddd-11ea-8a3a-ccda262736ce | https://socratic.org/questions/how-do-you-balance-nh-3-g-o-2-g-n-2-g-h-2o-g | 4 NH3(g) + 3 O2(g) -> 2 N2(g) + 6 H2O(g) | start chemical_equation qc_end chemical_equation 4 10 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"4 NH3(g) + 3 O2(g) -> 2 N2(g) + 6 H2O(g)"}] | [{"type":"chemical equation","value":"NH3(g) + O2(g) -> N2(g) + H2O(g)"}] | <h1 class="questionTitle" itemprop="name">How do you balance #NH_3(g) + O_2(g) -> N_2(g) + H_2O(g)#?</h1> | null | 4 NH3(g) + 3 O2(g) -> 2 N2(g) + 6 H2O(g) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This can be easily balanced through trial and error method or through algebraic method. Always consider to take inventories of the atoms from each element of the reactants and the products; that is, before and aft... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#4NH_3(g) + 3O_2(g) → 2N_2(g) + 6 H_2O(g)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This can be easily balanced ... | <article>
<h1 class="questionTitle" itemprop="name">How do you balance #NH_3(g) + O_2(g) -> N_2(g) + H_2O(g)#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="t... | How do you balance #NH_3(g) + O_2(g) -> N_2(g) + H_2O(g)#? | null |
93 | a83f6f1e-6ddd-11ea-9c45-ccda262736ce | https://socratic.org/questions/when-steam-hot-water-is-passed-over-iron-hydrogen-gas-and-iron-lll-oxide-are-for | 48.4 g | start physical_unit 1 1 mass g qc_end physical_unit 7 7 27 28 mass qc_end c_other OTHER qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Mass [OF] steam [IN] g"}] | [{"type":"physical unit","value":"48.4 g"}] | [{"type":"physical unit","value":"Mass [OF] iron [=] \\pu{100.0 g}"},{"type":"other","value":"When steam (hot water) is passed over iron, hydrogen gas and iron (lll) oxide are formed. "},{"type":"other","value":"react completely"}] | <h1 class="questionTitle" itemprop="name">When steam (hot water) is passed over iron, hydrogen gas and iron (lll) oxide are formed. What mass of steam would be needed to react completely with 100.0 g of iron? </h1> | null | 48.4 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p><strong>Step 1. Write the balanced equation.</strong></p>
<p><mathjax>#"2Fe" + "3H"_2"O" → "Fe"_2"O"_3 + "3H"_2#</mathjax></p>
<blockquote></blockquote>
<p><strong>Step 2. Calculate the mo... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The reaction requires 48.4 g of steam.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p><strong>Step 1. Write the... | <article>
<h1 class="questionTitle" itemprop="name">When steam (hot water) is passed over iron, hydrogen gas and iron (lll) oxide are formed. What mass of steam would be needed to react completely with 100.0 g of iron? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://... | When steam (hot water) is passed over iron, hydrogen gas and iron (lll) oxide are formed. What mass of steam would be needed to react completely with 100.0 g of iron? | null |
94 | aada862e-6ddd-11ea-8619-ccda262736ce | https://socratic.org/questions/a-chemist-weighed-out-3-89-g-of-nickel-what-is-the-number-of-moles-of-nickel-she | 0.07 moles | start physical_unit 7 7 mole mol qc_end physical_unit 7 7 4 5 mass qc_end end | [{"type":"physical unit","value":"Mole [OF] nickel [IN] moles"}] | [{"type":"physical unit","value":"0.07 moles"}] | [{"type":"physical unit","value":"Weight [OF] nickel [=] \\pu{3.89 g}"}] | <h1 class="questionTitle" itemprop="name">A chemist weighed out 3.89 g of nickel. What is the number of moles of nickel she weighed out?</h1> | null | 0.07 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>For this question, we need to use <a href="https://socratic.org/chemistry/the-periodic-table/the-periodic-table">the Periodic Table</a> to find the molar mass of <mathjax>#"Ni"#</mathjax> ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>She measured out <strong>0.0663 mol of nickel</strong>.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>For this... | <article>
<h1 class="questionTitle" itemprop="name">A chemist weighed out 3.89 g of nickel. What is the number of moles of nickel she weighed out?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<sp... | A chemist weighed out 3.89 g of nickel. What is the number of moles of nickel she weighed out? | null |
95 | ac9747b6-6ddd-11ea-9a53-ccda262736ce | https://socratic.org/questions/how-do-you-find-the-empirical-formulas-for-65-2-sc-34-8-o | Sc2O3 | start chemical_formula qc_end end | [{"type":"other","value":"Chemical Formula [OF] the compound [IN] empirical"}] | [{"type":"chemical equation","value":"Sc2O3"}] | [{"type":"physical unit","value":"Percent [OF] Sc in the compound [=] \\pu{65.2%}"},{"type":"physical unit","value":"Percent [OF] O in the compound [=] \\pu{34.8%}"}] | <h1 class="questionTitle" itemprop="name">How do you find the empirical formulas for 65.2% Sc, 34.8% O?</h1> | null | Sc2O3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The empirical formula is the simplest whole number ratio defining constituent atoms in a species. We assume a <mathjax>#100*g#</mathjax> mass of <mathjax>#Sc_2O_3#</mathjax>, and we come up with a molar ratio:</p>... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>As with all these problems, we ASSUME a <mathjax>#100*g#</mathjax> mass of compound.........and come up with an empirical formula of <mathjax>#Sc_2O_3#</mathjax>.</p></div>
</div>
</div>
<div class="answerDescription">
<... | <article>
<h1 class="questionTitle" itemprop="name">How do you find the empirical formulas for 65.2% Sc, 34.8% O?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="t... | How do you find the empirical formulas for 65.2% Sc, 34.8% O? | null |
96 | ace2becc-6ddd-11ea-9bd9-ccda262736ce | https://socratic.org/questions/how-would-you-balance-h2-o2-h2o-1 | 2 H2 + O2 -> 2 H2O | start chemical_equation qc_end chemical_equation 4 8 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"2 H2 + O2 -> 2 H2O"}] | [{"type":"chemical equation","value":"H2 + O2 -> H2O"}] | <h1 class="questionTitle" itemprop="name">How would you balance H2 + O2 = H2O?</h1> | null | 2 H2 + O2 -> 2 H2O | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From the original equation, you first need to write each component separately.</p>
<p><mathjax>#H_2 + O_2 = H_2O#</mathjax> </p>
<p>Left side: H = <strong>2</strong> ; O = <strong>2</strong> (number based on th... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>2H2 + O2 = 2H2O</p></div>
</div>
</div>
</div> | <article>
<h1 class="questionTitle" itemprop="name">How would you balance H2 + O2 = H2O?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itemprop="title">Chemistry</span>
</... | How would you balance H2 + O2 = H2O? | null |
97 | a86ef11e-6ddd-11ea-b61a-ccda262736ce | https://socratic.org/questions/in-the-reaction-k-2cro-4-aq-pbcl-2-aq-2kcl-aq-pbcro-4-s-how-many-grams-of-pbcro- | 24.2 grams | start physical_unit 10 10 mass g qc_end c_other OTHER qc_end chemical_equation 3 10 qc_end physical_unit 3 3 23 24 volume qc_end physical_unit 3 3 26 27 molarity qc_end end | [{"type":"physical unit","value":"Mass [OF] PbCrO4 [IN] grams"}] | [{"type":"physical unit","value":"24.2 grams"}] | [{"type":"other","value":"Excess of PbCl2."},{"type":"chemical equation","value":"K2CrO4(aq) + PbCl2(aq) -> 2 KCl(aq) + PbCrO4(s)"},{"type":"physical unit","value":"Volume [OF] K2CrO4 [=] \\pu{25.0 milliliters}"},{"type":"physical unit","value":"Molarity [OF] K2CrO4 [=] \\pu{3.0 M}"}] | <h1 class="questionTitle" itemprop="name">In the reaction #K_2CrO_4(aq) + PbCl_2(aq)->2KCl(aq) + PbCrO_4(s),# how many grams of #PbCrO_4# will precipitate out from the reaction between 25.0 milliliters of 3.0 M #K_2CrO_4# in an excess of #PbCl_2#? </h1> | null | 24.2 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p><strong>Given:</strong></p>
<ul>
<li>Balanced chemical equation</li>
<li>Volume of <mathjax>#"K"_2"CrO"_4#</mathjax> solution</li>
<li><a href="http://socratic.org/chemistry/solutions-and-... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>24.2 g of <mathjax>#"PbCrO"_4#</mathjax> will precipitate from the reaction.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></bl... | <article>
<h1 class="questionTitle" itemprop="name">In the reaction #K_2CrO_4(aq) + PbCl_2(aq)->2KCl(aq) + PbCrO_4(s),# how many grams of #PbCrO_4# will precipitate out from the reaction between 25.0 milliliters of 3.0 M #K_2CrO_4# in an excess of #PbCl_2#? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-t... | In the reaction #K_2CrO_4(aq) + PbCl_2(aq)->2KCl(aq) + PbCrO_4(s),# how many grams of #PbCrO_4# will precipitate out from the reaction between 25.0 milliliters of 3.0 M #K_2CrO_4# in an excess of #PbCl_2#? | null |
98 | aa7962aa-6ddd-11ea-9a47-ccda262736ce | https://socratic.org/questions/how-many-grams-of-fe-2o-3-are-there-in-0-500-mole-of-fe-2o-3 | 79.90 grams | start physical_unit 4 4 mass g qc_end physical_unit 4 4 8 9 mole qc_end end | [{"type":"physical unit","value":"Mass [OF] Fe2O3 [IN] grams"}] | [{"type":"physical unit","value":"79.90 grams"}] | [{"type":"physical unit","value":"Mole [OF] Fe2O3 [=] \\pu{0.500 mole}"}] | <h1 class="questionTitle" itemprop="name">How many grams of #Fe_2O_3# are there in 0.500 mole of #Fe_2O_3#?</h1> | null | 79.90 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Assume that:<br/>
n = number of moles <br/>
m = mass of substance<br/>
M = molar mass (equivalent to atomic weight on the periodic table)<br/>
<mathjax>#n = m -: M#</mathjax></p>
<p>0.500 moles has been given to yo... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>0.500 moles <mathjax>#xx#</mathjax> molar mass of <mathjax>#Fe_2O_3#</mathjax> = ??</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Assume... | <article>
<h1 class="questionTitle" itemprop="name">How many grams of #Fe_2O_3# are there in 0.500 mole of #Fe_2O_3#?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" itemprop="url">
<span class="breadcrumb" itempro... | How many grams of #Fe_2O_3# are there in 0.500 mole of #Fe_2O_3#? | null |
99 | a979840c-6ddd-11ea-a99a-ccda262736ce | https://socratic.org/questions/how-much-thermal-energy-is-absorbed-by-750-grams-of-water-when-its-temperature-i | 222.48 kJ | start physical_unit 10 10 heat_energy kj qc_end physical_unit 10 10 7 8 mass qc_end physical_unit 10 10 16 17 temperature qc_end physical_unit 10 10 19 20 temperature qc_end end | [{"type":"physical unit","value":"Absorbed thermal energy [OF] water [IN] kJ"}] | [{"type":"physical unit","value":"222.48 kJ"}] | [{"type":"physical unit","value":"Mass [OF] water [=] \\pu{750 grams}"},{"type":"physical unit","value":"Temperature1 [OF] water [=] \\pu{15.4 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] water [=] \\pu{86.3 ℃}"}] | <h1 class="questionTitle" itemprop="name">How much thermal energy is absorbed by 750 grams of water when its temperature increases from 15.4 C to 86.3°C? </h1> | null | 222.48 kJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#Q = m*c*DeltaT#</mathjax></p>
<p>Where ,</p>
<p>Q = Thermal Energy<br/>
m = mass of the matter,<br/>
c = Specific heat<br/>
ΔT = Temperature difference [ Delta T]</p>
<p>So there is "-</p>
<p>m = 750 gm<b... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>222.27 kJ</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#Q = m*c*DeltaT#</mathjax></p>
<p>Where ,</p>
<p>Q = Thermal Energy<br/... | <article>
<h1 class="questionTitle" itemprop="name">How much thermal energy is absorbed by 750 grams of water when its temperature increases from 15.4 C to 86.3°C? </h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="/chemistry" i... | How much thermal energy is absorbed by 750 grams of water when its temperature increases from 15.4 C to 86.3°C? | null |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.