Chemistry 10th Edition International Edition by Kenneth W – Test Bank.docx

Chemistry 10th Edition International Edition by
Kenneth W – Test Bank
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Sample Test
Chapter 3—Chemical Equations and Reaction Stoichiometry
MULTIPLE CHOICE
1. Which of the following is not a consequence of the Law of Conservation
of Matter?
2. It provides a basis for balancing chemical equations.
3. It means that there will be no observable change in the quantity of
matter during a chemical reaction.
4. As a result, there will be the same number of moles on both the reactant
and the product side of a balanced equation.
5. It can be stated as “matter is neither created nor destroyed during a
chemical reaction.”
6. All of these are a consequence of the Law of Conservation of Mass.

ANS: C
OBJ: Understand the implications of the Law of Conservation of Matter.
TOP: Chemical Equations
2. Balancing a chemical equation so that it obeys the law of conservation
of matter requires:
OBJ: Understand the implications of the Law of Conservation of Matter.
TOP: Chemical Equations
3. What scientific law requires that subscripts in formulas should never be
changed while balancing a chemical equation?

TOP: Chemical Equations
4. Balance the following equation with the smallest whole number
coefficients. What is the coefficient for O2 in the balanced equation?
C4H10 + O2  CO2 + H2O
TOP: Chemical Equations
5. Balance the following equation with the smallest whole number
coefficients. What is the coefficient for O2 in the balanced equation?
C4H9SO + O2  CO2 + SO2 + H2O
1. 54
2. 29
3. 23
4. 32
5. 27

ANS: E
DIF: Harder Question
OBJ: Balance a chemical equation.
TOP: Chemical Equations