The freezing point of 52.43 g of a pure solvent is measured to be 41.14 C. When 2.32 g of an unknown solute (assume the van 't Hoff factor = 1.0000) is added to the solvent the freezing point is measured to be 38.24 C. If the freezing point depression constant of the pure solvent is 7.61 Ckg solvent/mol solute calculate the molar mass of the solute.