Chemistry 110 - Elements of General Chemistry » Spring 2023 » Chapter 3 Quiz

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Question #1
A pure substance is:
A.   none of these
B.   composed of only one type of atom or molecule.
C.   composed of two or more different types of atoms or molecules combined in variable proportions.
D.   composed of two or more different types of atoms or molecules that has constant composition.
E.   composed of two or more regions with different compositions.
Question #2
Which of the following items is a mixture?
A.   none of these
B.   helium
C.   sugar
D.   brass
E.   water
Question #3
Which of the following is a homogeneous mixture?
A.   water
B.   none of these
C.   trail mix
D.   stainless steel
E.   molten iron
Question #4
How would you classify sugar?
A.   none of these
B.   pure substance-compound
C.   mixture-homogeneous
D.   mixture-heterogeneous
E.   pure substance-element
Question #5
Which of the following is a physical property?
A.   the combustion of gasoline
B.   the odor of spearmint gum
C.   the corrosive action of acid rain on granite
D.   the tarnishing of a copper statue
E.   none of these
Question #6
Which of the following is a chemical property?
A.   the melting and boiling point of water
B.   none of these
C.   the tarnishing of a copper statue
D.   the paint color on a new red Corvette
E.   the odor of spearmint gum
Question #7
If you hold a solid piece of pure gallium metal in your hand, your body heat will melt the gallium into its liquid form. This illustrates which of the following?
A.   distillation
B.   physical change
C.   none of these
D.   chemical property
E.   chemical change
Question #8
When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 18 grams of water from 8 grams of methane and 32 grams of oxygen, how many grams of carbon dioxide were produced in the reaction?
A.   18
B.   58
C.   40
D.   none of these
E.   22
Question #9
What is the value of 27°C on the Kelvin temperature scale?
A.   300K
B.   81K
C.   27K
D.   246K
Question #10
What is the value of 472 K on the Fahrenheit temperature scale?
A.   358oF
B.   472oF
C.   390oF
D.   199oF
Question #11
A 15.0 gram lead ball at 25.0°C was heated with 40.5 joules of heat. Given the specific heat of lead is 0.128 J/g∙°C, what is the final temperature (in degrees Celsius) of the lead?
A.   32.5oC
B.   46.1oC
C.   55.8oC
D.   29.3oC
Question #12
Assume it takes 108 joules of energy to raise the temperature of a bar of gold from 25.0°C to 29.7°C. Given that the specific heat capacity of gold is 0.128 J/g °C, what is the mass (in grams) of the bar of gold?
A.   65 g
B.   none of these
C.   129 g
D.   1.8 x 102 g
E.   5.6 x 10-3 g

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