Consider a mixture of gases consisting of 0.538 moles of He, 0.315 moles of Ne and 0.103 moles of Ar confined in a 7.00 L vessel at 25 ° C. What is the mole fraction of He gas in this mixture?

Question

Quizplus · Accepted Answer

- First, find the total moles of gas in the mixture:

Total moles of gas = 0.538 mol He + 0.315 mol Ne + 0.103 mol Ar = 0.956 mol

- Next, calculate the mole fraction of He gas:

Mole fraction of He gas = moles of He gas / total moles of gas

Mole fraction of He gas = 0.538 mol / 0.956 mol = 0.563

Therefore, the mole fraction of He gas in the mixture is 0.563. The correct answer is D.

Consider a Mixture of Gases Consisting of 0