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A liquid mixture of A and B is in equilibrium with a vapor mixture of the...

A liquid mixture of A and B is in equilibrium with a vapor mixture of the same A and B at 300K and 2.14 bar. At 300K, the vapor pressure of A is 6.21 bar, and that of B is 2.77 bar. What is the mole fraction of A in the liquid? Both the liquid and vapor phases are ideal

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