What is the volume percent of Ar in a 6.50 L flask that contains 0.200 mole of Ne, 0.300
Mole He, 0.600 mole of Ar at STP?

Name: What is the volume percent of Ar in a 6.50 L flask that contains 0.200 mole of Ne, 0.300 Mole He, 0.600 mole of Ar at STP?
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Question

Quizplus · Accepted Answer

At STP, 1 mole of any gas occupies 22.4 L. The total moles of gas in the flask is 0.200 + 0.300 + 0.600 = 1.100 moles. The mole fraction of Ar is 0.600/1.100. The volume percent is the mole fraction multiplied by 100, which gives 54.5%.

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