Chemistry Concepts and Applications

Chapter 1: The Science of Matter

Standardized Test Practice

1
In the chemical change shown, what is the total number of hydrogen atoms present after the reaction?

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A)3
B)4
C)5
D)6
2
What material is likely to be separated by the filter paper and funnel shown?

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A)hydrogen and oxygen
B)salt and water
C)sand and water
D)oxygen and nitrogen
3
Aspirin and sucrose are both examples of __________.

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A)mixtures
B)elements
C)compounds
D)models
4
The chemistry of the real world is mostly the chemistry of __________.

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A)elements
B)pure substances
C)compounds
D)mixtures
5
What happens when ice and aluminum are dropped into water?

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A)ice sinks, while aluminum floats
B)ice floats, while aluminum sinks
C)both float
D)both sink
6
According to the chart, which elements make up more than one-tenth of the human body?

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A)carbon and oxygen
B)carbon and hydrogen
C)nitrogen, carbon, and hydrogen
D)carbon, hydrogen, and oxygen
7
An object has a mass of 20.0 g and a volume of 10.0 mL. What is its density?
A)20.0 g
B)10.0 mL
C)2.00 g/mL
D)0.500 g/mL
8
Which is a chemical element?
A)gold
B)water
C)sand
D)sucrose
9
Which is not a compound?
A)butane
B)carbon dioxide
C)salt water
D)water
10
Which is NOT the formula for an element?
A)B
B)CO
C)Cu
D)H
11
Which is a chemical property of iron?
A)It conducts electricity
B)Its density is 7.87 g/mL
C)It is a solid at room temperature
D)It rusts
12
An exothermic reaction is one that __________.
A)absorbs energy
B)causes a color change
C)gives off energy
D)produces a solid
13
The color of a substance is called a __________.
A)chemical change
B)chemical property
C)physical change
D)physical property
14
The capacity to do work is called __________.
A)energy
B)mass
C)volume
D)density
15
Crushing a pure substance __________.
A)is a chemical change
B)is a physical change
C)decreases its melting point
D)increases its density
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