Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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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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2.
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Which
of the following is a formula equation for the formation of carbon dioxide from carbon and
oxygen? a. | Carbon plus
oxygen yields carbon dioxide. | b. | C + O2 ® CO2 | c. | CO2
® C +
O2 | d. | 2C + O ® CO2 | | |
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3.
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Which
coefficients correctly balance the formula equation CaO + H2O ®
Ca(OH)2? a. | 2, 1, 2 | c. | 1, 2, 1 | b. | 1, 2,
3 | d. | 1, 1,
1 | | | | |
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4.
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The
complete balanced equation for the reaction between zinc hydroxide and acetic acid
is a. | ZnOH +
CH3COOH ® ZnCH3COO + H2O. | b. | Zn(OH)2 + CH3COOH ® Zn + 2CO2
+3H2O. | c. | Zn(OH)2 + 2CH3COOH ®
Zn(CH3COO)2 + 2H2O. | d. | Zn(OH)2 + 2CH3COOH ® Zn(CH3COO)2 + H2 +
O2. | | |
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5.
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What
is the balanced equation for the combustion of sulfur? a. | S(s) +
O2(g) ® SO(g) | c. | 2S(s) + 3O2(g) ®
SO3(s) | b. | S(s) + O2(g) ®
SO2(g) | d. | S(s) +
2O2(g) ® SO42–(aq) | | | | |
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6.
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The
equation AX + BY ® AY + BX is the general equation for a a. | synthesis
reaction. | c. | single-replacement reaction. | b. | decomposition
reaction. | d. | double-replacement reaction. | | | | |
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7.
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The
reaction 2Mg(s) + O2(g) ® 2MgO(s) is a a. | synthesis
reaction. | c. | single-replacement reaction. | b. | decomposition
reaction. | d. | double-replacement reaction. | | | | |
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8.
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When
heated, a metal carbonate decomposes into a metal oxide and a. | carbon. | c. | oxygen. | b. | carbon dioxide. | d. | hydrogen. | | | | |
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9.
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Oxides of active metals, such as CaO, react with water to produce a. | metal
carbonates. | c. | acids. | b. | metal hydrides. | d. | metal hydroxides. | | | | |
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10.
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When
a metal chlorate is heated, it decomposes to yield a metal chloride and a. | a metal
oxide. | c. | hydrogen. | b. | a metal hydroxide. | d. | oxygen. | | | | |
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11.
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Predict the product of the following reaction: MgO + CO2 ® a. | MgCO3 | c. | MgC +
O3 | b. | Mg + CO3 | d. | MgCO2 + O | | | | |
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12.
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The
formulas for the products of the reaction between sodium hydroxide and sulfuric acid
are a. | Na2SO4 and H2O. | c. | SI4 and Na2O. | b. | NaSO4
and H2O. | d. | S +
O2 and Na. | | | | |
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13.
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What
is the balanced equation when aluminum reacts with copper(II) sulfate? a. | Al +
Cu2S ® Al2S + Cu | c. | Al + CuSO4 ® AlSO4 + Cu | b. | 2Al +
3CuSO4 ® Al2(SO4)3 +
3Cu | d. | 2Al +
Cu2SO4 ® Al2SO4 + 2Cu | | | | |
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Short Answer
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14.
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Write
balanced equation for
calcium chromate reacts with potassium chlorite à
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15.
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Write
balanced equation for
potassium reacts with water
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