Multiple Choice
A solution is prepared by mixing 50.0 g of benzene (C6H6) and 50.0 g of toluene (C7H8) at 25°C. The vapor pressures of pure benzene and pure toluene at this temperature are 95.1 mmHg and 28.4 mmHg, respectively. Assuming ideal behavior, what is the mole fraction of benzene in the vapor above the solution?
28
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