At a Given Temperature, You Have a Mixture of Benzene

question 38

Multiple Choice

At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene (vapor pressure of pure toluene = 290 torr) . The mole fraction of benzene in the vapor above the solution is 0.590. Assuming ideal behavior, calculate the mole fraction of toluene in the solution.

• A) 0.778
• B) 0.359
• C) 0.213
• D) 0.590
• E) 0.641

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