Calculate the freezing point of a solution of 3.46 g of a compound, X, in 160 g of
benzene. When a separate sample of X was vaporised, its density was found to be
3.27 g/L at 116°C and 773 torr. The freezing point of pure benzene is 5.45°C, and
Kf
is 5.12°C kg/mol.