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 50% A?
A) y/(2x + 2y)
B) y/(x + y)
C) x/(2x + 2y)
D) x/(x + y)
E) none of these
Correct Answer:
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