answers. 1 the amount of matter that a material has is its ___. b mass a c d volume density...
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Answers
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1 The amount of matter that a material has is its ___.
B mass
A
C
D
volume
density
composition
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2 Lithium reacts with oxygen to produce lithium oxide. The product in this reaction is ___.
C
A
B
lithium
oxygen
lithium oxide
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3 Which of the following is not a pure substance?
C Salt water
A
B
CO2
He
D H2O
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4 Which of the following is a mixture?
A
B
C
Air
Aspirin
Tacos
D All of the above are mixtures
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5 Which of the following is a heterogeneous mixture?
A Trail mix
B
C
Soda
Orange juice (no pulp)
D Vanilla ice cream
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6 How many phases are in a homogeneous mixture?
A 1 only
B
C
2 only
2 or more
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7 Which of the following is a compound?
B BH3
A
C
H-1
Ca2+
D Hg
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8 The variable that is changed in an experiment is the ___.
B independent variable
A
C
control
dependent variable
D hypothesis
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9 A concise statement that summarizes numerous observations is a(n) ___.
C scientific law
A
B
hypothesis
scientific theory
D observation
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10 Which of the following is not a physical property of hydrogen?
C It combines with oxygen to produce water.
A
B
It is a gas at room temp.
It has a density of 0.89 g/mL.
D It has no color.
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11 What state of matter has an indefinite shape and indefinite volume?
C
A
B
Solid
Liquid
Gas
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12 What of the following is a physical change?
C Evaporation
A
B
Burning
Rusting
D Explosion
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13 The statement “the pressure of a gas increases with decreasing volume because there are more collisions between particles” is a ___.
B scientific theory
A
C
scientific law
hypothesis
D experiment
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14 Which of the following is not a physical change?
B cooking a hamburger
A
C
melting butter
freezing water
D peeling an orange
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15 Lithium metal reacts with water to produce lithium oxide. Is this a physical or chemical change?
B
A physical
chemical
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16 Which statement about compounds is true?
C Compounds have a fixed composition
A
B
Compounds can be separated by physical meansCompounds consist of more than 1 phase
D All of the above are true
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17 Which statement about mixtures is true?
A
B
C
Mixtures can consist of one phase or more than 1 phaseMixtures can be separated by physical meansIn a mixture, properties of the individual parts are maintained
D All of the above are true
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18What is one difference between a mixture and a compound?
B A compound can only be separated by chemical means
A
C
A compound consists of more than one phase
A mixture can only be formed by chemical means
D A mixture must be uniform in composition
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19What is the best way to check that a chemical reaction has occurred?
C See if the chemical composition changed
A
B
See if a gas was produced
D See if the color changed
See if light/energy was produced
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20What happens to matter in a chemical reaction?
A It is conserved. You get out what you put in.
B
C Matter is gained.
Matter is lost.
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21 What is an intensive property of iron?
A
B
C
Its color
Its hardness
Its magnetism
D All of the above are intensive properties
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22 How would you describe the following picture?
A heterogeneous mixture of gas molecules
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23 What do chemical symbols and formulas represent, respectively
B Elements and compounds
A
C
Compounds and mixtures
Elements and ions
D Elements and mixtures
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24 What state of matter expands when it is heated and is easy to compress?
C Gas
A
B
Solid
Liquid
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25 Two features that define matter are _____.
C Mass and volume
A
B
Weight and volume
Mass and velocity
D Weight and velocity
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26A substance that can be changed into simpler substances by chemical
means is a ______.
A
B
C
Product
Mixture
Element
D Compound
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27The substance produced in a chemical reaction is called a(n) ______.
A product
B
C catalyst
reactant
D excess reagent
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Indicate whether the following are physical (P) or chemical (C) properties of
sulfur 28 Sulfur is a solid at room temp
Sulfur is a poor conductor of electricity
Sulfur combines with oxygen to produce sulfur dioxide
29
30
P
C
P
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Indicate whether the following are physical (P) or chemical (C) changes
31 Pizza is cut into slices
Aluminum and iodine react to produce aluminum iodide
Water is boiled32
33
P
P
C
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Indicate whether the following are heterogeneous (HT) or homogeneous
(HM) mixtures
34 Blueberry muffin
Orange juice with extra pulp
Blood35
36
HT
HM
HT
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Indicate whether the following are mixtures (M), elements (E) or
compounds (C)
37 Propane (C3H8)
Ice cream
Gold38
39
C
E
M
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What is one unique physical property of iron that allows it to be easily separated from a mixture?
40
Iron is magnetic