Post Laboratory Questions (include the answers in the lab notebook). 1. From the first data set (a), calculate the molal freezing point depression constant, Kf, for the cyclohexane solvent. Assume. naphthalene (C10H8) is a non-electrolytes Using the Kf obtained from Part A, and the following data, calculate the molar mass of the unknown organic substance. Assume the unknown substance is a non-electrolyte