Question

Benzene, C6H6, and toluene, C6H5CH3, form ideal solutions. At 35ºC the vapor pressure of benzene is 160. torr and that of toluene is 50.0 torr. In an experiment, 3.6 mol of benzene and 5.5 mol of toluene are placed in a closed container at 35ºC and allowed to come to equilibrium. What is the mole fraction of toluene in the vapor phase?
A) 0.52
B) 0.68
C) 0.32
D) 0.14
E) 0.60

Answer

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