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Gases
Imagine that you have a 6.00 L gas tank and a 4.00 L gas tank.
You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
If you fill the larger tank with oxygen to a pressure of 156 bar, to what pressure should you fill the acetylene tank to ensure
that you run out of each gas at the same time?
Assume ideal behavior for all gases.
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If 90.5 moles of an ideal gas is at 1.77 atm at 34.80 °C,
what is the volume of the gas?
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A motorist fills his car tires to 32 lb/in2 pressure at a temperature of 30°C.
Assuming no change in volume,
what will the pressure in the tires be when the motorist drives across Death Valley, with a pavement temperature of 78°C?
A. 37 lb/in 2
B. 83 lb/in 2
C. 12 lb/in 2
D. 4.8 lb/in 2
E. 28 lb/in2
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A gas with a volume of 2 L is allowed to expand to a volume of 10 L.
What happens to the pressure in the
container if the temperature remains constant?
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How many moles of gas would it take to fill an average man’s lungs,
total capacity of which is about 4.5 L?
Assume 1 atm pressure and 37 ℃
A. 11.2 mol
B. 0.75 mol
C. 37 mol
D. 1.24 mol
E. 0.177 mol
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The mass of 2.37 L of a gas is 8.91 g. What is the density of the gas?
A. 21.1 g/L
B. 3.76 g/L
C. 6.54 g/L
D. 0.266 g/L
E. None of these
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The number of moles in 2.50 L of nitrogen gas at 100 °C and 700 mm Hg is
A. 57.1
B. 2.11
C. 0.280
D. 0.0752
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What will happen to the volume of a bubble of air found underwater in a deep lake, if the bubble rises to the surface,
where the temperature is double what it was underwater and the pressure is half of what it was underwater?
Its volume will become…
A. greater by a factor of 2
B. greater by a factor of 4
C. greater by a factor of 2.5
D. smaller by a factor of 4
E. volume will not change under these conditions
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A 12 L gas confined in a container exerts 3.8 × 104 mm Hg.
If the pressure is reduced to 760 mm Hg,
what will be the volume of the gas?
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You purchase a butane tank that can hold gas safely up to a pressure of 38.1 atm.
When the tank contains 100 grams of butane (C4H10) at 19.9°C, the gas exerts a pressure of 13.8 atm.
What is the highest temperature to which the butane can be heated safely?
(Report your answer in °C)
Assume that butane is an ideal gas that does not liquify.
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A sample of gas has an initial volume of 2.4 L at a pressure of 843 mm Hg and a temperature of 304 K.
If the gas is heated to a temperature of 402 K and therefore expands to 4.7 L, what is its final pressure (in mm Hg)?
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A sample of gas occupies a volume of 3.2 L at 1.8 atm. What would be its volume if the pressure is doubled?
reduced by one-half?
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A 268 cm3 sample of an ideal gas at 18°C and 748 Torr pressure is placed in an evacuated container
of volume 648 cm3.
To what Celsius temperature must the assembly be heated so that the gas will fill the
whole chamber at 748 Torr?
A. 431 °C
B. 597 °C
C. 704 °C
D. 120 °C
E. 324 °C
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If a metal reacts with a strong acid at 25 ℃ and produces 0.023 mole of H2,
what is the volume of "dry" hydrogen at STP?
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Nitrogen gas fills a 300. L reaction container at 100℃ and 1.00 atm.
Determine the volume of the same quantity of nitrogen at 0℃ and 1.25 atm.
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Determine the pressure change when a constant volume of gas at 1.00 atm is
heated from 20.0℃ to 303 K?
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A 28.8 g piece of dry ice is allowed to sublime into a large balloon.
Assuming that all of the carbon dioxide ends up in the ballroom, what will the volume
of the balloon be at a temperature
of 22℃ and a pressure of 742 mmHg
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325 mL of a gas at STP has a mass of 0.805 grams.
What is the molar mass of the gaseous compound?
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The gas in a container has a pressure of 6 atm at 27°C.
What will the pressure be if the temperature is lowered
to -173°C?
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If a gas is compressed from 8 L to 2 L and the temperature remains constant,
what happens to the pressure?
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How many moles of gaseous helium are found in a 500.0 mL flask at 25℃ and 745 torr?
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The tires on a particular road-bike can handle a pressure of 150. psi. What is this pressure in mm Hg?
A. 1420 mm Hg
B. 760 mm Hg
C. 10.2 mm Hg
D. 3810 mm Hg
E. 7760 mm Hg
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