Liquid A has vapor pressure x. Liquid B has vapor pressure y, and x > y. What is the mole fraction of A in the liquid mixture if the vapor above the solution is 30% A?
A) 0.7x/(0.7x + 0.3y)
B) 0.3x/(0.3x + 0.7y)
C) 0.7y/(0.3x + 0.7y)
D) 0.3y/(0.7x + 0.3y)
E) none of these
Correct Answer:
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