Unit Test — Unit test Answers
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The volume of a gas is 0.450 L when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L?Use .
A
0.225 atmB
0.444 atmC
2.25 atmD
4.44 atm22
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Which best defines partial pressure in a mixture of gases?
A
pressure that is exerted by all the gases of a mixture on the containerB
pressure that is exerted by one gas as if it occupied a container by itselfC
half of the pressure that is exerted by the gases of a mixture on the containerD
sum of the individual pressures that are exerted by two or more gases23
How many kPa are in 2,150 mmHg?
A
2.83 kPaB
287 kPaC
1.61 ´ 104 kPaD
2.18 ´ 105 kPa24
Which is the best example of immiscible liquids?
A
two polar liquids that have high surface tensionsB
a polar liquid and a nonpolar liquid that have low surface tensionsC
two nonpolar liquids that can dissolve into one anotherD
a polar liquid and a nonpolar liquid that do not dissolve into one another25
best
Increasing the temperature of a gas decreases the pressure.
OptionIncreasing the temperature of a gas increases the pressure.
OptionIncreasing the pressure on a gas decreases the volume.
OptionIncreasing the pressure on a gas increases the volume.
Option26
A substance is made up of slow-moving particles that have very little space between them. Based on this information, what can most likely be concluded about this substance?
A
It is not a gas because its particles do not move continuously.B
It is a gas because its particles move continuously in a straight line.C
It is not a gas because its particles do not have large spaces between them.D
It is a gas because its particles move in many different directions.Did you find these answers helpful?
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