The dissolution of 5.25g of a substance in 565g of benzene at 298K raises the boiling point by 0.6225 deg celsius. Note that Kf=5.12K kg/mol, Kb=2.53K kg/mol, and the density of benzene is 876.6kg/m^3. Calculate the freezing point depression, the ratio of the vapor pressure above the solution to that of the pure solvent, and the molecular weight of the solute, Pbenzene=103 Torr at 298K.