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In a gas mixture of He, Ne, and Ar with a total pressure of 8.40 atm, the mole fraction of Ar is ________ if the partial pressures of He and Ne are 1.50 and 2.00 atm respectively.

pHe = 1.50 atm.
pNe = 2.00 atm.
pAr = 8.40 atm - 1.50 - 2.00 = ??

mole fraction Ar = pAr/total p.

3 answers

0.58

0.417

.583

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