Question 1

Which of the following compounds is an Arrhenius base?

Accepted Answer

A)  CH3OH
B)  CH3CO2H
C)  HOCl
D)  CsOH

Question 2

Lithium and nitrogen react to produce lithium nitride: 
6Li(s) +  N2\mathrm { N } _ { 2 }N2​  (g) ?  2Li32 \mathrm { Li } _ { 3 }2Li3​  N(s) 
How many moles of lithium nitride are produced when 0.450 mol of lithium react in this fashion?

Accepted Answer

A)  0.150
B)  0.900
C)  0.0750
D)  1.35
E)  0.225

Question 3

What are the required coefficients to properly balance the following chemical reaction? SO2(g) + O2(g) + H2O(l) → H2SO4(aq)

Accepted Answer

A)  1,1,1,1
B)  1,2,1,2
C)  1,2,2,1
D)  2,1,2,2
E)  2,1,1,2

Question 4

Determine the oxidation state of Mn in KMnO4.

Accepted Answer

Question 5

How many grams of CaCl2 are formed when 15.00 mL of 0.00237 mol L-1 Ca(OH) 2 reacts with excess Cl2 gas? 
2Ca(OH) 2(aq) + 2Cl2(g) → Ca(OCl) 2(aq) + CaCl2(s) + 2H2O(l)

Accepted Answer

A)  0.00197 g
B)  0.00394 g
C)  0.00789 g
D)  0.0507 g

Question 6

What are the required coefficients to properly balance the following chemical reaction? CH4(g) + H2O(g) → CO(g) + H2(g)

Accepted Answer

A)  1,2,2,3
B)  1,1,2,2
C)  2,1,1,3
D)  2,2,1,1
E)  1,1,1,3

Question 7

A solution is prepared by adding 1.40 g of solid NaCl to 50.0 mL of 0.100 mol L-1  CaCl2\mathrm { CaCl } _ { 2 }CaCl2​  .What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Accepted Answer

A)  0.228 mol L-1
B)  0.579 mol L-1
C)  0.479 mol L-1
D)  0.679 mol L-1
E)  0.128 mol L-1

Question 8

Define a limiting reactant.

Accepted Answer

A limiting reactant is a react...

Question 9

Which of the compounds H2C2O4,Ca(OH) 2,KOH,and HI behave as bases when they are dissolved in water?

Accepted Answer

A)  Ca(OH) 2 and KOH
B)  H2C2O4 and HI
C)  only HI
D)  only KOH

Question 10

How many molecules of HCl are formed when 50.0 g of water reacts according to the following balanced reaction? 
Assume excess ICl3. 2ICl3 + 3H2O → ICl + HIO3 + 5HCl

Accepted Answer

A)  2.78 × 1024 molecules HCl
B)  1.67 × 1024 molecules HCl
C)  5.02 × 1025 molecules HCl
D)  6.09 × 1025 molecules HCl
E)  3.65 × 1024 molecules HCl A

Question 11

Which of the following describes sugar?

Accepted Answer

A)  strong electrolyte,weak acid
B)  weak electrolyte,weak acid
C)  strong electrolyte,strong acid
D)  weak electrolyte,strong acid
E)  nonelectrolyte

Question 12

Identify the location of oxidation in an electrochemical cell.

Accepted Answer

A)  the anode
B)  the cathode
C)  the electrode
D)  the salt bridge
E)  the socket

Question 13

Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 6.20 g of carbonic acid? H2CO3 → H2O + CO2

Accepted Answer

A)  4.40 g
B)  8.80 g
C)  2.20 g
D)  6.20 g A

Question 14

Calculate the number of grams of solute in 500.0 mL of 0.189 mol L-1 KOH.

Accepted Answer

A)  5.30 g
B)  5.30 × 103 g
C)  1.68 g
D)  1.68 × 10-3 g
E)  21.2 g A

Question 15

Identify the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K2S and Fe(NO3) 2 are mixed.

Accepted Answer

A)  K+(aq) + NO3-(aq) → KNO3(s) 
B)  Fe2+(aq) + S2-(aq) + 2K+(aq) + 2NO3-(aq) → FeS(s) + 2K+(aq) + 2NO3-(aq) 
C)  Fe2+(aq) + S2-(aq) + 2K+(aq) + 2NO3-(aq) → Fe2+(aq) + S2-(aq) + 2KNO3(s) 
D)  Fe2+(aq) + S2-(aq) → FeS(s) 
E)  No reaction occurs.

Question 16

How many electrons are transferred in the following reaction? (The reaction is unbalanced.)  Mg(s) + Al3+(aq) → Al(s) + Mg2+(aq)

Accepted Answer

A)  6
B)  2
C)  3
D)  1
E)  4

Question 17

What is the oxidation number of the oxygen atom in Na2O2 ?

Accepted Answer

A)  -2
B)  -1
C)  +1
D)  +2

Question 18

According to the following balanced reaction,how many moles of KOH will be formed from 5.44 moles of H2O? Assume an excess of KO. 
4KO(s) + 2H2O(l) → 4KOH(s) + O2(g)

Accepted Answer

A)  2.72 moles KOH
B)  16.7 moles KOH
C)  10.9 moles KOH
D)  8.33 moles KOH
E)  4.87 moles KOH

Question 19

Based on the balanced chemical equation shown below,determine the mass percent of Fe3+ in a  0.7450 g0.7450 \mathrm {~g}0.7450 g  sample of iron ore if 22.40 mL of a 0.1000 mol L-1 stannous chloride,SnCl2(aq) ,solution is required to completely react with the Fe3+ present in the ore sample.The chemical equation for the reaction is 2Fe3+(aq) + Sn2+(aq) ? 2Fe2+(aq) + Sn4+(aq)

Accepted Answer

A)  5.365%
B)  8.396%
C)  16.79%
D)  33.58%

Question 20

How many moles of nitrogen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g mol-1. 4KNO3(s) → 2K2O(s) + 2N2(g) + 5O2(g)

Accepted Answer

A)  0.290 mol N2
B)  0.580 mol N2
C)  18.5 mol N2
D)  0.724 mol N2
E)  1.73 mol N2

Exam 4: Chemical Reactions and Stoichiometry

Which of the following compounds is an Arrhenius base?

Correct Answer
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Lithium and nitrogen react to produce lithium nitride: 6Li(s) + $\mathrm { N } _ { 2 }$ (g) ? $2 \mathrm { Li } _ { 3 }$ N(s) How many moles of lithium nitride are produced when 0.450 mol of lithium react in this fashion?

Correct Answer
verified

What are the required coefficients to properly balance the following chemical reaction? SO₂(g) + O₂(g) + H₂O(l) → H₂SO₄(aq)

Correct Answer
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Determine the oxidation state of Mn in KMnO₄.

Correct Answer
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How many grams of CaCl₂ are formed when 15.00 mL of 0.00237 mol L^-1 Ca(OH) ₂ reacts with excess Cl₂ gas? 2Ca(OH) ₂(aq) + 2Cl₂(g) → Ca(OCl) ₂(aq) + CaCl₂(s) + 2H₂O(l)

Correct Answer
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What are the required coefficients to properly balance the following chemical reaction? CH₄(g) + H₂O(g) → CO(g) + H₂(g)

Correct Answer
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A solution is prepared by adding 1.40 g of solid NaCl to 50.0 mL of 0.100 mol L^-1 $\mathrm { CaCl } _ { 2 }$ .What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Correct Answer
verified

Define a limiting reactant.

Correct Answer
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A limiting reactant is a react...
View Answer

Which of the compounds H₂C₂O₄,Ca(OH) ₂,KOH,and HI behave as bases when they are dissolved in water?

Correct Answer
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How many molecules of HCl are formed when 50.0 g of water reacts according to the following balanced reaction? Assume excess ICl₃. 2ICl₃ + 3H₂O → ICl + HIO₃ + 5HCl

Correct Answer
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A

Which of the following describes sugar?

Correct Answer
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Identify the location of oxidation in an electrochemical cell.

Correct Answer
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Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 6.20 g of carbonic acid? H₂CO₃ → H₂O + CO₂

Correct Answer
verified
A

Calculate the number of grams of solute in 500.0 mL of 0.189 mol L^-1 KOH.

Correct Answer
verified
A

Identify the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K₂S and Fe(NO₃) ₂ are mixed.

Correct Answer
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How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Mg(s) + Al³⁺(aq) → Al(s) + Mg²⁺(aq)

Correct Answer
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What is the oxidation number of the oxygen atom in Na₂O₂?

Correct Answer
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According to the following balanced reaction,how many moles of KOH will be formed from 5.44 moles of H₂O? Assume an excess of KO. 4KO(s) + 2H₂O(l) → 4KOH(s) + O₂(g)

Correct Answer
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Correct Answer
verified

How many moles of nitrogen are formed when 58.6 g of KNO₃ decomposes according to the following reaction? The molar mass of KNO₃ is 101.11 g mol^-1. 4KNO₃(s) → 2K₂O(s) + 2N₂(g) + 5O₂(g)

Correct Answer
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Exam 4: Chemical Reactions and Stoichiometry

Which of the following compounds is an Arrhenius base?

Correct AnswerverifiedShow Answer

Lithium and nitrogen react to produce lithium nitride: 6Li(s) + N2\mathrm { N } _ { 2 }N2​ (g) ? 2Li32 \mathrm { Li } _ { 3 }2Li3​ N(s) How many moles of lithium nitride are produced when 0.450 mol of lithium react in this fashion?

Correct AnswerverifiedShow Answer

What are the required coefficients to properly balance the following chemical reaction? SO2(g) + O2(g) + H2O(l) → H2SO4(aq)

Correct AnswerverifiedShow Answer

Determine the oxidation state of Mn in KMnO4.

Correct AnswerverifiedShow Answer

How many grams of CaCl2 are formed when 15.00 mL of 0.00237 mol L-1 Ca(OH) 2 reacts with excess Cl2 gas? 2Ca(OH) 2(aq) + 2Cl2(g) → Ca(OCl) 2(aq) + CaCl2(s) + 2H2O(l)

Correct AnswerverifiedShow Answer

What are the required coefficients to properly balance the following chemical reaction? CH4(g) + H2O(g) → CO(g) + H2(g)

Correct AnswerverifiedShow Answer

A solution is prepared by adding 1.40 g of solid NaCl to 50.0 mL of 0.100 mol L-1 CaCl2\mathrm { CaCl } _ { 2 }CaCl2​ .What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Correct AnswerverifiedShow Answer

Define a limiting reactant.

Correct AnswerverifiedA limiting reactant is a react...View AnswerShow Answer

Which of the compounds H2C2O4,Ca(OH) 2,KOH,and HI behave as bases when they are dissolved in water?

Correct AnswerverifiedShow Answer

How many molecules of HCl are formed when 50.0 g of water reacts according to the following balanced reaction? Assume excess ICl3. 2ICl3 + 3H2O → ICl + HIO3 + 5HCl

Correct AnswerverifiedA

Which of the following describes sugar?

Correct AnswerverifiedShow Answer

Identify the location of oxidation in an electrochemical cell.

Correct AnswerverifiedShow Answer

Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 6.20 g of carbonic acid? H2CO3 → H2O + CO2

Correct AnswerverifiedA

Calculate the number of grams of solute in 500.0 mL of 0.189 mol L-1 KOH.

Correct AnswerverifiedA

Identify the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K2S and Fe(NO3) 2 are mixed.

Correct AnswerverifiedShow Answer

How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Mg(s) + Al3+(aq) → Al(s) + Mg2+(aq)

Correct AnswerverifiedShow Answer

What is the oxidation number of the oxygen atom in Na2O2 ?

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According to the following balanced reaction,how many moles of KOH will be formed from 5.44 moles of H2O? Assume an excess of KO. 4KO(s) + 2H2O(l) → 4KOH(s) + O2(g)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

How many moles of nitrogen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g mol-1. 4KNO3(s) → 2K2O(s) + 2N2(g) + 5O2(g)

Correct AnswerverifiedShow Answer

Correct Answer
verified

Lithium and nitrogen react to produce lithium nitride: 6Li(s) + $\mathrm { N } _ { 2 }$ (g) ? $2 \mathrm { Li } _ { 3 }$ N(s) How many moles of lithium nitride are produced when 0.450 mol of lithium react in this fashion?

Correct Answer
verified

What are the required coefficients to properly balance the following chemical reaction? SO₂(g) + O₂(g) + H₂O(l) → H₂SO₄(aq)

Correct Answer
verified

Determine the oxidation state of Mn in KMnO₄.

Correct Answer
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How many grams of CaCl₂ are formed when 15.00 mL of 0.00237 mol L^-1 Ca(OH) ₂ reacts with excess Cl₂ gas? 2Ca(OH) ₂(aq) + 2Cl₂(g) → Ca(OCl) ₂(aq) + CaCl₂(s) + 2H₂O(l)

Correct Answer
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What are the required coefficients to properly balance the following chemical reaction? CH₄(g) + H₂O(g) → CO(g) + H₂(g)

Correct Answer
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A solution is prepared by adding 1.40 g of solid NaCl to 50.0 mL of 0.100 mol L^-1 $\mathrm { CaCl } _ { 2 }$ .What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Correct Answer
verified

Correct Answer
verified
A limiting reactant is a react...
View Answer

Which of the compounds H₂C₂O₄,Ca(OH) ₂,KOH,and HI behave as bases when they are dissolved in water?

Correct Answer
verified

How many molecules of HCl are formed when 50.0 g of water reacts according to the following balanced reaction? Assume excess ICl₃. 2ICl₃ + 3H₂O → ICl + HIO₃ + 5HCl

Correct Answer
verified
A

Correct Answer
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Correct Answer
verified

Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 6.20 g of carbonic acid? H₂CO₃ → H₂O + CO₂

Correct Answer
verified
A

Calculate the number of grams of solute in 500.0 mL of 0.189 mol L^-1 KOH.

Correct Answer
verified
A

Identify the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K₂S and Fe(NO₃) ₂ are mixed.

Correct Answer
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How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Mg(s) + Al³⁺(aq) → Al(s) + Mg²⁺(aq)

Correct Answer
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What is the oxidation number of the oxygen atom in Na₂O₂?

Correct Answer
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According to the following balanced reaction,how many moles of KOH will be formed from 5.44 moles of H₂O? Assume an excess of KO. 4KO(s) + 2H₂O(l) → 4KOH(s) + O₂(g)

Correct Answer
verified

Correct Answer
verified

How many moles of nitrogen are formed when 58.6 g of KNO₃ decomposes according to the following reaction? The molar mass of KNO₃ is 101.11 g mol^-1. 4KNO₃(s) → 2K₂O(s) + 2N₂(g) + 5O₂(g)

Correct Answer
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