Vapour-liquid equilibrium of a two-component ideal solution of trichloroethene (C2HCl3) and trichloromethane (CHCl3) is establis
hed at 25 °C. The mole fraction of CHCl3 in the vapour phase is 0.59. What is the mass fraction of C2HCl3 in the liquid phase? Round your answer to two significant figures. The vapour pressures of trichloroethene and trichloromethane at 25 °C are: