3. A measurement of the freezing temperature of a solution allowsyou to calculate the concentration of the solution. What else do you need to measure to determine the molar mass of the solid added to the solvent

Osmotic pressure and boiling point elevation

Explanation:

In the the osmotic pressure one can determine the molar mass of a solid by calculating the number  of  moles from the Morality formula which involves the volume of the solution.

In the boiling point elevation you can determine the number of moles of the solute in the solution by using the Molality formula.