Unit 6-Gases Review

Quiz by Kate Downey

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30 questions
• Q1
A sample of helium gas occupies 2.65 L at 1.20 atm. What pressure would this sample of gas exert in a 1.50-L container at the same temperature?
1.20 atm
2.12 atm
0.679 atm
3.31 atm
30s
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• Q2
A sample of helium gas is at 23°C and has a pressure of 0.956 atm. What temperature will it have at 0.993 atm?(leave in K)
307.47 C
23.89 K
307.47 K
284.9 K
30s
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• Q3
What would happen to the average kinetic energy of the molecules of a gas sample if the pressure increased from 1 atm to 2 atm?
it would stay the same
it would increase
it would decrease
30s
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• Q4
Boyle's Law states:
The volume decreases as the temperature increases if the pressure remains the same
The pressure increases as the volume increases if the temperature remains the same
The volume increases as the pressure decreases if the temperature remains the same
The volume increases as the temperature increases if the pressure remains the same
30s
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• Q5
Charles Law states
The pressure increases as the volume decreases if and only if the temperature remains the same
The volume decreases as the temperature increases if and only if the pressure remains the same
The pressure increases as the volume increases if and only if the temperature remains the same
The volume increases as the temperature increases if and only if the pressure remains the same
30s
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• Q6
A gas is most like which of these situations
none of the above
students in a hallway
sitting at the lunch table
pool balls on a pool table
30s
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• Q7
What are the factors that effect gas pressure
all of the above
temperature
volume
number of particles
30s
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• Q8
Pressure is force per unit
area
volume
mass
pressure
30s
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• Q9
Which statement about the Kinetic Molecular Theory is false?
All matter is composed of tiny particles.
Particles are constantly colliding with each other and the container.
Molecules move in an orderly fashion.
Collisions are perfectly elastic.
30s
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• Q10
How will the volume of a sample of gas change if the pressure is increased and temperature is constant?
Volume will remain unchanged
Volume will go up
Volume will go down
Impossible to tell without actual measurements
30s
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• Q11
Charles law state that if pressure decreases temperature ____________.
stays the same
decreases
increases
30s
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• Q12
When air is heated it _____________ and exerts _________ air pressure than cooler air.
expands ; more
expands ; less
condenses ; less
condenses ; more
30s
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• Q13
Which form of water would have the lowest density?
They would all have the same
Ice
steam
liquid water
30s
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• Q14
How does a can collapse when a vacuum pump removes the air from the can?
The inside and outside forces balance out and crush the can.
The vacuum creates a force that crushes the can.
The atmosphere exerts pressure on the inside of the can crushing it
The outside force from air pressure is greater than inside crushing the can
30s
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• Q15
Empty space with no particles and no pressure.
kinetic molecular theory
vaccum
atompshere
barometer
30s
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• Q16
Winds always move from ___ to ___ pressure
high to high
low to low
high to low
low to high
30s
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• Q17
Areas near the poles generally have ___ pressure as the air cools becomes more dense and sinks.
variable
high
medium
low
30s
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• Q18
In a convection current, warm air is heated ___, then cools and ____.
sinks, rises
rises, rises,
rises, sinks
sinks , sinks
30s
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• Q19

As the number of gas particles in a container increases, the pressure will...

remain the same

decrease

increase

30s
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• Q20

What change will result in the pressure of a gas in a container decreasing?

volume of the container is increased

temperature is increased

number of particles is increased

30s
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