See explanation below.
Work Step by Step
A non-volatile solute is dissolved in methanol with a solubility of 20 g/100 mL. Calculate the molar mass of the solute if the vapor pressure of this saturated solution at 20°C is 83 mmHg. Given that the density and vapor pressure of methanol are 0.792 g/mL and 95.7 mmHg at 20°C respectively.