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Question

A sealed vessel contains 0.5 moles of oxygen, 0.1 moles of carbon dioxide, and 0.4 moles of nitrogen gas. The total pressure of the gas mixture is 5 atm. What is the partial pressure of the carbon dioxide?

A
0.5 atm
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B
2.5 atm
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C
2.0 atm
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D
0.1 atm
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E
5 atm
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Solution

The correct option is B 0.5 atm
The mole fraction of carbon dioxide = number of moles of carbon dioxide total number of moles of mixture =0.10.5+0.1+0.4=0.1

The partial pressure of carbon dioxide = mole fraction of carbon dioxide× total pressure =0.1×5=0.5 atm.

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