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Final Exam 2
Test Description: Final
Instructions: Answer all questions to get your test result.
1) What happens to the volume of a gas during compression?
A
The volume remains constant.
B
It is impossible to tell because all gases are different.
C
The volume decreases.
D
The volume increases.
2) Pressure is the force per unit
A
surface area
B
depth
C
volume
D
length
3) What instrument measures atmospheric pressure?
A
manometer
B
torrometer
C
vacuum pump
D
barometer
4) The volume of a gas is 5.0 L when the temperature is 5.0ºC. If the temperature is increased to 10.0ºC without changing the pressure, what is the new volume?
A
2.5 L
B
10.0 L
C
5.1 L
D
4.8 L
5) The pressure of a sample of gas increases from 450. mm Hg to 500. mm Hg. If the volume is constant and the temperature of the gas was 0.0ºC, what is the new gas temperature?
A
–30.ºC
B
30.ºC
C
273ºC
D
50.ºC
6) If five gases in a cylinder each exert 1 atm, what is the total pressure exerted by the gases?
A
5 atm
B
0.2 atm
C
0.5 atm
D
1 atm
7) Calculate the approximate volume of a 0.600 mol sample of gas at 15.0ºC and a pressure of 1.10 atm.
A
12.9 L
B
24.6 L
C
22.4 L
D
129 L
8) What is the pressure exerted by 1.2 mol of a gas with a temperature of 20.ºC and a volume of 9.5 L?
A
30. atm
B
1.0 atm
C
3.0 atm
D
0.030 atm
9) A liquid can be described as having
A
A definite volume and shape
B
A definite volume and no definite shape
C
A definite volume and takes the shape of its container
D
No definite volume and shape
10) Evaporation is _____________.
A
The attraction of the surface of a liquid to the surfaces of a solid
B
The process by which particles escape from the surface of a nonboiling liquid and enter the gas state
C
A force that pulls adjacent parts of a liquid’s surface together
D
the process by which a liquid or solid changes to a gas
11) Why does water have such a relatively high boiling point?
A
Because of the strong polar-covalent bonds between oxygen and hydrogen atoms
B
Because of the strong hydrogen bonds between water molecules
C
Because of its surface tension
D
None of the above
12) In the expression like dissolves like, the word like refers to similarity in molecular
A
energy
B
mass
C
size
D
polarity
13) Which of the following is miscible in oil?
A
all of these
B
water
C
iodine
D
food coloring
14) Sugar is soluble in water because sugar molecules are
A
polar
B
small
C
nonpolar
D
massive
15) When water is used as a solvent, it is called _____.
A
hydration
B
non-polar bonding
C
effusion
D
diffusion
16) Which of the following is an electrolyte?
A
water
B
glass
C
sodium chloride (table salt)
D
sugar
17) A substance whose water solution does NOT conduct a current is a(n)
A
nonelectrolyte
B
electrolytes
C
ionic substance
D
polar substance
18) Molecules whose water solutions conduct current
A
do not dissolve in water.
B
require carbon to decompose in water
C
ionize in water.
D
can crystallize.
19) Which of the following does NOT increase the rate of dissolving a solid in water?
A
using larger pieces of solid
B
crushing the solid
C
raising the temperature
D
stirring
20) Which of the following will dissolve most rapidly?
A
powdered sugar in hot water
B
sugar cubes in hot water
C
powdered sugar in cold water
D
sugar cubes in cold water
*select an answer for all questions
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