Matching
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Match each item with the correct statement below. a. | distillation | d. | compound | b. | mass | e. | element | c. | chemical
reaction | f. | homogeneous
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1.
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substance that cannot be changed into simpler substances by chemical
means
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2.
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a process in which a liquid is boiled to produce a vapor that is condensed
again into a liquid
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3.
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amount of matter an object contains
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4.
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describes mixture with a uniform composition
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5.
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composed of two or more substances chemically combined in a fixed
proportion
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6.
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process in which substances are changed into different substances
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Match each item with the correct statement below. a. | mixture | d. | reactant | b. | product | e. | heterogeneous mixture | c. | phase | f. | vapor |
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7.
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a substance formed in a chemical reaction
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8.
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a physical blend of two or more components
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9.
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starting substance in a chemical reaction
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10.
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part of a sample having uniform composition and properties
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11.
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gaseous state of substance that is a liquid or solid at room
temperature
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12.
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not uniform in composition
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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13.
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A vapor is which state of matter?
a. | gas | c. | liquid | b. | solid | d. | all of the
above |
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14.
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The chemical symbol for iron is ____.
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15.
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Which of the following is NOT a physical change?
a. | mixing two cheeses in a bowl | c. | melting cheese | b. | grating
cheese | d. | fermenting of
cheese |
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16.
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Which of the following is NOT a physical property of water?
a. | It has a boiling point of 100 C. | b. | Sugar dissolves in
it. | c. | It is a colorless liquid. | d. | It is composed of hydrogen and
oxygen. |
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17.
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Which of the following is used for chemical symbols today?
a. | numbers | c. | letters | b. | icons | d. | drawings |
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18.
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Which state of matter takes both the shape and volume of its container?
a. | solid | c. | gas | b. | liquid | d. | both b and c |
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19.
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When paper turns yellow-brown upon exposure to sunlight, what type of change is
likely taking place?
a. | a physical change | b. | neither a physical change nor a chemical
change | c. | a chemical change | d. | both a physical change and a chemical
change |
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20.
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All of the following changes to a metal are physical changes EXCEPT ____.
a. | polishing | c. | melting | b. | bending | d. | rusting |
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21.
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Which state of matter has a definite volume and takes the shape of its
container?
a. | solid | c. | gas | b. | liquid | d. | both b and c |
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22.
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Which of the following is a chemical property?
a. | ability to react with oxygen | c. | color | b. | hardness | d. | freezing point |
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23.
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All of the following are physical properties of matter EXCEPT ____.
a. | mass | c. | color | b. | melting point | d. | ability to rust |
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24.
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A chemical change occurs when a piece of wood ____.
a. | decays | c. | is cut | b. | is split | d. | is painted |
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25.
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A substance that forms a vapor is generally in what physical state at room
temperature?
a. | solid | c. | liquid or solid | b. | liquid | d. | gas |
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26.
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All of the following are physical properties of a substance in the liquid state
EXCEPT ____.
a. | indefinite volume | c. | indefinite shape | b. | definite mass | d. | not easily
compressed |
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27.
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What do chemical symbols and formulas represent, respectively?
a. | atoms and mixtures | b. | elements and ions | c. | elements and
compounds | d. | compounds and mixtures |
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28.
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Separating a solid from a liquid by evaporating the liquid is called
____.
a. | distillation | c. | solution | b. | condensation | d. | filtration |
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29.
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When an iron nail is ground into powder, its mass ____.
a. | stays the same | c. | cannot be determined | b. | increases | d. | decreases |
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30.
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Which of the following is a heterogeneous mixture?
a. | steel | c. | air | b. | soil | d. | salt water |
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31.
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Which of the following does NOT indicate that a chemical change may have taken
place?
a. | energy transfer | c. | fracture formation | b. | gas production | d. | precipitate
formation |
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32.
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Which state of matter is characterized by having an indefinite shape, but a
definite volume?
a. | liquid | c. | gas | b. | solid | d. | none of the
above |
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33.
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An example of an extensive property of matter is ____.
a. | mass | c. | temperature | b. | hardness | d. | pressure |
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34.
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Which of the following is true for all chemical reactions?
a. | The total mass of the products is greater than the total mass of the
reactants. | b. | The total mass of the reactants equals the total mass of the
products. | c. | The total mass of the reactants increases. | d. | The total mass of
the products is less than the total mass of the reactants. |
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35.
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Which state of matter expands when heated and is easy to compress?
a. | liquid | c. | solid | b. | gas | d. | all of the
above |
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36.
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The first figure in a properly written chemical symbol always is ____.
a. | italicized | c. | boldfaced | b. | capitalized | d. | underlined |
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37.
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A substance that can be separated into two or more substances only by a chemical
change is a(n) ____.
a. | solution | c. | mixture | b. | compound | d. | element |
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38.
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Which of the following represents a compound?
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39.
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Which of the following is NOT an example of matter?
a. | air | c. | heat | b. | water vapor | d. | smoke |
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40.
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Which of the following is true about compounds?
a. | They have compositions that vary. | b. | They are substances. | c. | They have properties
similar to those of their component elements. | d. | They can be physically separated into their
component elements. |
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41.
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Which of the following is a physical change?
a. | corrosion | c. | evaporation | b. | rotting of food | d. | explosion |
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42.
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A golf ball has more mass than a tennis ball because it ____.
a. | has a definite composition | c. | contains more
matter | b. | takes up more space | d. | contains different kinds of matter |
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43.
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Which of the following is a homogeneous mixture?
a. | sand and water | c. | salt water | b. | beef stew | d. | soil |
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44.
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Which state of matter is characterized by having a definite shape and a definite
volume?
a. | solid | c. | gas | b. | liquid | d. | all of the
above |
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45.
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In the chemical reaction in which sucrose is heated and decomposes to form
carbon dioxide and water, which of the following is a reactant?
a. | sucrose | c. | water | b. | carbon dioxide | d. | heat |
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Numeric Response
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46.
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In how many physical states does water commonly exist?
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47.
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What is the boiling point of water in degrees Celsius?
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48.
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What is the melting point of water in degrees Celsius?
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49.
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How many grams of liquid water are produced when 60 grams of ice melt?
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Essay
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50.
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State the law of conservation of mass. Then apply the law to this question: What
would be the total mass of the products of a reaction in which 10 grams of water decomposes into the
elements hydrogen and oxygen?
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51.
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Discuss the difference between physical changes and chemical changes. Use an
example to illustrate the difference.
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52.
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Define element and compound. Explain the difference between an
element and a compound.
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