78. Solving a chemistry problem

78. Solving a chemistry problem

2. At a temperature of 60 C, the saturated vapor pressure of benzene is 51.3 kPa, and the saturated vapor pressure of toluene is 18. kPa. The mole fraction of benzene in the vapor over a solution containing 1 mole of benzene and 2 moles of toluene is (give the answer with an accuracy of thousandths)

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