Water and chlorobenzene are immiscible liquids. Their mixture boils at 90°C under a reduced pressure — Solutions and Colligative Properties Chemistry Question

Question

Water and chlorobenzene are immiscible liquids. Their mixture boils at 90°C under a reduced pressure of 9.031 × 10⁴ Pa. The vapour pressure of pure water at 90°C is 7.031 × 10⁴ Pa and the molecular mass of chlorobenzene is 112.5. On mass per cent basis, chlorobenzene in the distillate is equal to