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1.
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The
reaction Pb(NO3)2 +
2 KI --> PbI2 + 2 KNO3
is a a. | double
replacement reaction | c. | synthesis
reaction | b. | single replacement reaction | d. | decomposition reaction | | | | |
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2.
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In
what kind of reaction do two elements combine to form one compound? a. | double
replacement reaction | c. | synthesis
reaction | b. | single replacement reaction | d. | decomposition reaction | | | | |
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3.
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The
substances to the left of the arrow (“yield” sign) in a chemical equation are
called a. | products | b. | reactants | c. | molecules | d. | compounds | | | | | | | | |
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4.
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With
which type of chemical reaction must you use the activity series to determine if the reaction will
actually take place? a. | double replacement reaction | c. | synthesis reaction | b. | single
replacement reaction | d. | decomposition
reaction | | | | |
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5.
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In
what type of reaction does one compound produce two elements? a. | double
replacement reaction | c. | synthesis
reaction | b. | single replacement reaction | d. | decomposition reaction | | | | |
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6.
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What
is the general term for the number written below the line with a formula, such as the “2”
in CO2? a. | reactant | b. | product | c. | coefficient | d. | subscript | | | | | | | | |
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7.
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What
observation of a chemical reaction would indicate that a gas is being formed? a. | color
change | c. | a precipitate is
formed | b. | heat is given off | d. | bubbling and fizzing | | | | |
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8.
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The
substances to the right of the arrow (“yield” sign) in a chemical equation are
called a. | products | b. | reactants | c. | molecules | d. | compounds | | | | | | | | |
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9.
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In
writing an equation that produces hydrogen gas, the correct representation of hydrogen gas
is
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10.
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What
is the whole number that appears in front of a formula in a chemical equation? a. | subscript | b. | superscript | c. | ratio | d. | coefficient | | | | | | | | |
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11.
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Which
of the following is the correct equation for the formation of carbon dioxide from carbon and
oxygen? a. | C +
2 O --> CO2 | c. | C + O2 -->
CO2 | b. | CO2 --> C +
O2 | d. | 2 C
+ O --> CO2 | | | | |
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12.
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Which
observation does NOT indicate that a chemical reaction has occurred? a. | change in the
total mass of substances | c. | evolution of
heat and light | b. | formation of a precipitate | d. | production of a gas | | | | |
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13.
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According to the law of conservation of mass, the total mass of the reacting
substances is a. | always more than
the total mass of the products | b. | always less than the total mass of the
products | c. | sometimes more and sometimes less than the total mass of the
products | d. | always equal to the total mass of the
products | | |
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14.
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The
equation A + BC --> AC +
B is the general equation for a a. | double
replacement reaction | c. | decomposition
reaction | b. | single replacement reaction | d. | combustion reaction | | | | |
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15.
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When
the equation Fe3O4 + Al -->
Al2O3 + Fe is correctly balanced, what is
the coefficient of Fe?
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