Question 1

Which salt is produced by the neutralization of potassium hydroxide with sulfuric acid?

Accepted Answer

A)  KSO3
B)  K2(SO4) 3
C)  K2SO4
D)  K(SO4) 2
E)  KSO4F) B) and D)
G) A) and E)

Question 2

Which of these chemical equations does not describe a redox reaction?

Accepted Answer

A)  2KBr(aq)  + Cl2(g)  → 2KCl(aq)  + Br2(l) 
B)  2Na(s)  + 2H2O(l)  → 2NaOH(aq)  + H2(g) 
C)  3NO2(g)  + H2O(l)  → 2HNO3(aq)  + NO(g) 
D)  2KNO3(s)  → 2KNO2(s)  + O2(g) 
E)  2LiOH(aq)  + H2SO4(aq)  → Li2SO4(aq)  + 2H2O(l) F) C) and D)
G) All of the above

Question 3

Suppose white atoms (W)  and black atoms (B)  react according to the following balanced chemical equation. 2W + B → BW2
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Accepted Answer

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G) B) and E)

Question 4

Which chemical equation describes a combustion reaction?

Accepted Answer

A)  2C2H6(g)  + 7O2(g)  → 4CO2(g)  + 6H2O(l) 
B)  LiOH(aq)  + HNO3(aq)  → LiNO3(aq)  + H2O(l) 
C)  N2(g)  + 3H2(g)  → 2NH3(g) 
D)  2Na(s)  + 2H2O(l)  → 2NaOH(aq)  + H2(g) 
E)  2Al(s)  + 3H2SO4(aq)  → Al2(SO4) 3(aq)  + 3H2(g) F) B) and C)
G) B) and D)

Question 5

What is the coefficient of O2 when the following equation is properly balanced with the smallest set of whole numbers? __ C2H4 + __ O2 → __ CO2 + __ H2O

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  6F) D) and E)
G) A) and E)

Question 6

Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.)  ___ CH4 + ___ Cl2 → ___ CCl4 + ___ HCl

Accepted Answer

A)  4
B)  6
C)  8
D)  10
E)  12F) A) and E)
G) All of the above

Question 7

In the reaction 5H2O2 + 2MnO4− + 6H+ → 2Mn2+ + 8H2O + 5O2, what is the oxidizing agent?

Accepted Answer

A)  H2O2
B)  MnO4−
C)  H+
D)  Mn2+
E)  O2F) B) and E)
G) None of the above

Question 8

Balance the following equation: B2O3(s)  + HF(l)  → BF3(g)  + H2O(l)

Accepted Answer

A)  B2O3(s)  + 6HF(l)  → 2BF3(g)  + 3H2O(l) 
B)  B2O3(s)  + H6F6 (l)  → B2F6(g)  + H6O3(l) 
C)  B2O3(s)  + 2HF(l)  → 2BF3(g)  + H2O(l) 
D)  B2O3(s)  + 3HF(l)  → 2BF3(g)  + 3H2O(l) 
E)  B2O3(s)  + 6HF(l)  → 2BF3(g)  + 6H2O(l) F) B) and E)
G) C) and E)

Question 9

Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.)  ___ Cr + ___ H2SO4 → ___ Cr2(SO4) 3 + ___ H2

Accepted Answer

A)  4
B)  9
C)  11
D)  13
E)  15F) C) and D)
G) A) and D)

Question 10

What is the reducing agent in the following reaction? Mg + NiO2 + 2H2O → Mg(OH) 2 + Ni(OH) 2

Accepted Answer

A)  Mg
B)  NiO2
C)  H2O
D)  Mg(OH) 2
E)  Ni(OH) 2F) A) and E)
G) C) and E)

Question 11

Which of these equations does not represent an oxidation-reduction reaction?

Accepted Answer

A)  3Al + 6HCl → 3H2 + AlCl3
B)  2H2O → 2H2 + O2
C)  2NaCl + Pb(NO3) 2 → PbCl2 + 2NaNO3
D)  2NaI + Br2 → 2NaBr + I2
E)  Cu(NO3) 2 + Zn → Zn(NO3) 2 + CuF) All of the above
G) None of the above

Question 12

If aqueous solutions of Mg(C2H3O2) 2 and LiOH are mixed, which insoluble precipitate is formed?

Accepted Answer

A)  LiC2H3O2
B)  Li(C2H3O2) 2
C)  MgOH
D)  Mg(OH) 2
E)  CH3OHF) A) and E)
G) A) and D)

Question 13

Which salt is produced by the neutralization of nitric acid with calcium hydroxide?

Accepted Answer

A)  CaNO3
B)  Ca2(NO3) 3
C)  Ca3(NO3) 2
D)  Ca2NO3
E)  Ca(NO3) 2F) None of the above
G) B) and E)

Question 14

Balance the following equation: UO2(s)  + HF(l)  → UF4(s)  + H2O(l)

Accepted Answer

A)  UO2(s)  + 2HF(l)  → UF4(s)  + H2O(l) 
B)  UO2(s)  + 4HF(l)  → UF4(s)  + 2H2O(l) 
C)  UO2(s)  + H4F4(l)  → UF4(s)  + H4O2(l) 
D)  UO2(s)  + 4HF(l)  → UF4(s)  + 4H2O(l) 
E)  UO2(s)  + 8HF(l)  → 2UF4(s)  + 4H2O(l) F) A) and E)
G) B) and C)

Question 15

What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ___ Na + ___ H2O → ___ NaOH + ___ H2

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) B) and E)
G) D) and E)

Question 16

What is the reducing agent in the following reaction? 5Fe2+(aq)  + MnO4−(aq)  + 8H+(aq)  → 5Fe3+(aq)  + Mn2+(aq)  + 4H2O(l)

Accepted Answer

A)  Fe2+
B)  MnO4−
C)  H+
D)  Mn2+
E)  Fe3+F) A) and B)
G) A) and C)

Question 17

Balance the following equation for the combustion of benzene: C6H6(l)  + O2(g)  → H2O(g)  + CO2(g)

Accepted Answer

A)  C6H6(l)  + 9O2(g)  → 3H2O(g)  + 6CO2(g) 
B)  C6H6(l)  + 9O2(g)  → 6H2O(g)  + 6CO2(g) 
C)  2C6H6(l)  + 15O2(g)  → 6H2O(g)  + 12CO2(g) 
D)  C6H6(l)  + 15O2(g)  → 3H2O(g)  + 6CO2(g) 
E)  2C6H6(l)  + 9O2(g)  → 6H2O(g)  + 12CO2(g) F) B) and E)
G) A) and C)

Question 18

What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ___ Al4C3 + ___ H2O → ___ Al(OH) 3 + ___ CH4

Accepted Answer

A)  3
B)  4
C)  6
D)  12
E)  24F) A) and B)
G) A) and C)

Question 19

What is the coefficient preceding O2 when the following combustion reaction of a fatty acid is properly balanced using the smallest set of whole numbers? __ C18H36O2 + __ O2 → __ CO2 + __ H2O

Accepted Answer

A)  1
B)  8
C)  9
D)  26
E)  27F) B) and D)
G) A) and D)

Question 20

Based on the solubility rules, which of these processes will occur when solutions of ZnSO4(aq)  and MgCl2(aq)  are mixed?

Accepted Answer

A)  ZnCl2 will precipitate; Mg2+ and SO42− are spectator ions.
B)  ZnSO4 will precipitate; Mg2+ and Cl− are spectator ions.
C)  MgSO4 will precipitate; Zn2+ and Cl− are spectator ions.
D)  MgCl2 will precipitate; Zn2+ and SO42− are spectator ions.
E)  No precipitate will form.F) A) and B)
G) D) and E)

Exam 10: Chemical Reactions and Chemical Equations

If aqueous solutions of Mg(C2H3O2) 2 and LiOH are mixed, which insoluble precipitate is formed?

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Balance the following equation for the combustion of benzene: C6H6(l) + O2(g) → H2O(g) + CO2(g)

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What is the reducing agent in the following reaction? Mg + NiO2 + 2H2O → Mg(OH) 2 + Ni(OH) 2

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In the reaction 5H2O2 + 2MnO4− + 6H+ → 2Mn2+ + 8H2O + 5O2, what is the oxidizing agent?

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Which of these equations does not represent an oxidation-reduction reaction?

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Which of these chemical equations does not describe a redox reaction?

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Which salt is produced by the neutralization of nitric acid with calcium hydroxide?

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What is the coefficient of O2 when the following equation is properly balanced with the smallest set of whole numbers? __ C2H4 + __ O2 → __ CO2 + __ H2O

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What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ___ Na + ___ H2O → ___ NaOH + ___ H2

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Balance the following equation: B2O3(s) + HF(l) → BF3(g) + H2O(l)

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Which chemical equation describes a combustion reaction?

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Suppose white atoms (W) and black atoms (B) react according to the following balanced chemical equation. 2W + B → BW2 If the initial reaction mixture is prepared as follows, what will the final reaction mixture be once the reaction is complete?

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Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.) ___ Cr + ___ H2SO4 → ___ Cr2(SO4) 3 + ___ H2

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What is the coefficient preceding O2 when the following combustion reaction of a fatty acid is properly balanced using the smallest set of whole numbers? __ C18H36O2 + __ O2 → __ CO2 + __ H2O

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What is the reducing agent in the following reaction? 5Fe2+(aq) + MnO4−(aq) + 8H+(aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l)

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Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.) ___ CH4 + ___ Cl2 → ___ CCl4 + ___ HCl

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Which salt is produced by the neutralization of potassium hydroxide with sulfuric acid?

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What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ___ Al4C3 + ___ H2O → ___ Al(OH) 3 + ___ CH4

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Based on the solubility rules, which of these processes will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed?

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Balance the following equation: UO2(s) + HF(l) → UF4(s) + H2O(l)

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If aqueous solutions of Mg(C₂H₃O₂) ₂ and LiOH are mixed, which insoluble precipitate is formed?

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Balance the following equation for the combustion of benzene: C₆H₆(l) + O₂(g) → H₂O(g) + CO₂(g)

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What is the reducing agent in the following reaction? Mg + NiO₂ + 2H₂O → Mg(OH) ₂ + Ni(OH) ₂

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In the reaction 5H₂O₂ + 2MnO₄⁻ + 6H⁺ → 2Mn²⁺ + 8H₂O + 5O₂, what is the oxidizing agent?

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What is the coefficient of O₂ when the following equation is properly balanced with the smallest set of whole numbers? C₂H₄ + O₂ → CO₂ + H₂O

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What is the coefficient of H₂O when the following equation is properly balanced with the smallest set of whole numbers? _ Na + _ H₂O → _ NaOH + _ H₂

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Balance the following equation: B₂O₃(s) + HF(l) → BF₃(g) + H₂O(l)

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Suppose white atoms (W) and black atoms (B) react according to the following balanced chemical equation. 2W + B → BW₂ If the initial reaction mixture is prepared as follows, what will the final reaction mixture be once the reaction is complete?

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Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.) _ Cr + _ H₂SO₄ → _ Cr₂(SO₄) ₃ + _ H₂

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What is the coefficient preceding O₂ when the following combustion reaction of a fatty acid is properly balanced using the smallest set of whole numbers? C₁₈H₃₆O₂ + O₂ → CO₂ + H₂O

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What is the reducing agent in the following reaction? 5Fe²⁺(aq) + MnO₄⁻(aq) + 8H⁺(aq) → 5Fe³⁺(aq) + Mn²⁺(aq) + 4H₂O(l)

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Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.) _ CH₄ + _ Cl₂ → _ CCl₄ + _ HCl

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What is the coefficient of H₂O when the following equation is properly balanced with the smallest set of whole numbers? _ Al₄C₃ + _ H₂O → _ Al(OH) ₃ + _ CH₄

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Based on the solubility rules, which of these processes will occur when solutions of ZnSO₄(aq) and MgCl₂(aq) are mixed?

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Balance the following equation: UO₂(s) + HF(l) → UF₄(s) + H₂O(l)

Correct Answer
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