Benzene (C6H6) and toluene (C6H5CH3) form nearly ideal solutions. At 20 °C the vapor pressure of benzene is 74.7 torr, and that of toluene is 22.3 torr. Find the equilibrium partial vapor pressures at 20°C solution of 100 g of benzene plus 100 g of toluene. Find the mole fractions in the vapor phase that is in equalibrium with the above solution.