Question 1

Which is a correct description of the following reaction? H2SO4 + Cd(OH)2 → 2H2O + CdSO4

Accepted Answer

A) This reaction is an acid-base reaction. 
B) In this reaction, hydrogen is oxidized. 
C) In this reaction, sulfur is oxidized. 
D) In this reaction, cadmium is oxidized. 
E) In this reaction, oxygen is oxidized. 
A) This reaction is an acid-base reaction. 
B) In this reaction, hydrogen is oxidized. 
C) In this reaction, sulfur is oxidized. 
D) In this reaction, cadmium is oxidized. 
E) In this reaction, oxygen is oxidized.

Question 2

Identify the oxidizing agent in the chemical reaction 2MnO4− + 5H2SO3→ 2Mn2+ + 5SO42− + 4H+ + 3H2O.

Accepted Answer

A) MnO4− 
B) H2SO3 
C) Mn2+ 
D) SO42− 
E) H+ 
A) MnO4− 
B) H2SO3 
C) Mn2+ 
D) SO42− 
E) H+

Question 3

Identify the net ionic equation for the following reaction: 2NaCl(aq) + Hg2(NO3)2(aq) → 2NaNO3(aq) + Hg2Cl2(s)

Accepted Answer

A) Na+(aq) + NO3− (aq) → NaNO3(aq) 
B) Hg22+(aq) + 2Cl−(aq) → Hg2Cl2(s) 
C) 2Hg+(aq) + 2Cl−(aq) → 2HgCl(s) 
D) Hg2(NO3)2(aq) → Hg22+(aq) + 2NO3−(aq) 
E) Hg22+(aq) → Hg2(s) 
A) Na+(aq) + NO3− (aq) → NaNO3(aq) 
B) Hg22+(aq) + 2Cl−(aq) → Hg2Cl2(s) 
C) 2Hg+(aq) + 2Cl−(aq) → 2HgCl(s) 
D) Hg2(NO3)2(aq) → Hg22+(aq) + 2NO3−(aq) 
E) Hg22+(aq) → Hg2(s)

Question 4

When a chemical equation is balanced, it will have a set of whole number coefficients that cannot be reduced to smaller whole numbers.What is the coefficient for O2 when the following combustion reaction of a hydrocarbon is balanced? ___ C7H14 + ___ O2 → ___ CO2 + ___ H2O

Accepted Answer

A) 42 
B) 21 
C) 11 
D) 10 
E) None of these answers is correct. 
A) 42 
B) 21 
C) 11 
D) 10 
E) None of these answers is correct.

Question 5

What is the coefficient of O2 when the following equation is properly balanced with the smallest set of whole numbers? ___ CH3OH + ___ O2 → ___ CO2 + ___ H2O

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 7 
E) None of these answers is correct. 
A) 1 
B) 2 
C) 3 
D) 7 
E) None of these answers is correct.

Which is a correct description of the following reaction? H₂SO₄ + Cd(OH)₂ → 2H₂O + CdSO₄

Identify the oxidizing agent in the chemical reaction 2MnO₄⁻ + 5H₂SO₃→ 2Mn²⁺ + 5SO₄²⁻ + 4H⁺ + 3H₂O.

Identify the net ionic equation for the following reaction: 2NaCl(aq) + Hg₂(NO₃)₂(aq) → 2NaNO₃(aq) + Hg₂Cl₂(s)

When a chemical equation is balanced, it will have a set of whole number coefficients that cannot be reduced to smaller whole numbers.What is the coefficient for O₂ when the following combustion reaction of a hydrocarbon is balanced? _ C₇H₁₄ + _ O₂ → _ CO₂ + _ H₂O

What is the coefficient of O₂ when the following equation is properly balanced with the smallest set of whole numbers? _ CH₃OH + _ O₂ → _ CO₂ + _ H₂O

Atoms and Elements

Electrons and the Periodic Table

Compounds and Chemical Bonds

How Chemists Use Numbers

The Mole and Chemical Formulas

Molecular Shape

Solids, Liquids, and Phase Changes

Gases

Physical Properties of Solutions

Using Balanced Chemical Equations

Acids and Bases

Equilibrium

Organic Chemistry

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Nuclear Chemistry

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Exam 10: Chemical Reactions and Chemical Equations