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A gas occupies 2.2L at 425 kPa. Determine its volume at standard pressure. The temperature
does not change.
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9.2 L
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At room temperature (21°C), the pressure of carbon dioxide in an unopened soda can is 207kPa. Find the pressure of the carbon dioxide in the soda can if left in the trunk of a car on a hot summer day (72°).
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242 kPa
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• A gas occupies 15.7L at 28°C and 658mmHg. At what temperature will it expand to 20.5L at a pressure of 595mmHg?
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355K
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• Find the volume occupied by 12.2g of argon gas at 23°C and 115kPa.
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6.54L
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• At what temperature will 5.0g of chlorine fill a 950mL flask at 125kPa?
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202K
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• What mass of hydrogen gas was collected in a eudiometer if the volume was 35.2mL, the temperature was 23°C and the pressure of the dry hydrogen was 94.2kPa?
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0.00270g
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A student blows up a balloon to a volume of 23.1L at 21.4°C. He then places the balloon in an ice water bath, where the temperature is 2.5°C.
Find the new volume of the balloon.
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21.6L
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• A gas occupies 14.5L at 28°C and 450mmHg. Determine its volume at STP.
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7.8L
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• A student collects hydrogen over water at 23°C. The pressure in the room is 99.2kPa. The water vapor pressure at 23°C is 2.8kPa. Find the pressure of the dry hydrogen gas.
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96.4 kPa
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• Which gas below would effuse at the fastest rate:
– A. Hydrogen– B. Argon– C. Helium– D. Carbon monoxide
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• A. hydrogen
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• A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg.
• Which tank has more molecules?
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• They have the same number of molecules!
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• A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg.
• Which tank has is heavier?
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helium
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• A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg.
• Which gas has the higher average kinetic energy?
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• They have the same average kinetic energy
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• Find the density of nitrogen dioxide at STP.
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2.05 g/L
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• Find the density of nitrogen dioxide at 25°C and 96kPa.
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1.8 g/L
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• Find the molar mass of a gas if 12.2g of a gas occupies 2.44L at 94kPa and 24°C.
The gas is a monoatomic element. Identify the gas.
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131.3 g/molXe