7. Gases

Partial Pressure

Multiple Choice
A gas mixture contains 72.8% chlorine and 27.2% neon by mass. What is the partial pressure of neon in the mixture if the total pressure is recorded as 809 mmHg?
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Multiple Choice
A 2.50-L container contains a mixture of helium, nitrogen, and argon gas. The total pressure is 1.800 atm at 295 K. The partial pressure of helium is 0.650 atm, and the partial pressure of nitrogen is 0.350 atm. How many moles of argon gas are present in the mixture?
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Multiple Choice
In the reaction of calcium metal and water, 50.0 mL of hydrogen gas is collected over water at 25.0℃ with a total pressure of 752 mmHg. Calculate the number of moles of hydrogen gas that was produced.
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Open Question
What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume?
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Open Question
A 15-l cylinder contains 4.0 g of hydrogen and 28 g of nitrogen. If the temperature is 27 °C, what is the total pressure of the mixture?
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Open Question
A mixture of three gases has a total pressure of 1,380 mmHg at 298 K. The mixture is analyzed and is found to contain 1.27 mol CO₂, 3.04 mol CO, and 1.50 mol Ar. What is the partial pressure of Ar?
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Open Question
A mixture of 10.0 g of nNe and 10.0 g Ar have a total pressure of 1.6 atm. What is the partial pressure of Ne?
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Open Question
The apparatus below consists of two bulbs connected by a stopcock. After the stopcock is opened, what is the partial pressure of He assuming constant temperature?
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Open Question
What is the partial pressure of argon, par, in the flask?
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Open Question
What is the partial pressure of ethane, pethane, in the flask?
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Multiple Choice
A gas mixture contains each of the following gases at the indicated partial pressures: N₂, 257 Torr; O₂, 189 Torr; and He, 107 Torr. What is the total pressure of the mixture?
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Multiple Choice
A gas mixture with a total pressure of 795 mmHg contains CO2 at 107 mmHg, Ar at 255 mmHg, and O2 at 184 mmHg. The mixture also contains helium gas. What mass of helium gas is present in a 12 L container at 298 K?
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Multiple Choice
A gas mixture with a total pressure of 795 mmHg contains the following gases at the indicated partial pressures: 155 mmHg CO2, 235 mmHg Ar, and 109 mmHg O2. The mixture also contains helium gas. What mass of helium gas is present in the mixture, given that the molar mass of helium is 4.00 g/mol?
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Multiple Choice
A mixture of 10.0 g of Ne and 10.0 g of Ar has a total pressure of 1.60 atm. What is the partial pressure of Ar in the mixture?
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Multiple Choice
A mixture of 7.87 g CH4 and 7.13 g Xe is placed in a container, and the total pressure is found to be 0.51 atm. Determine the partial pressure of Xe in atm.
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