1. The problem statement, all variables and given/known data A 1.40 g sample of an unknown is dissolved in 8.10 g of lauric acid. The freezing point is depressed 1.23 oC. What is the molar mass of the unknown? 2. Relevant equations Delta T = Kf * m 3. The attempt at a solution Delta T = Kf * m => m = 1.23 / 3.9 = 0.32 mole solute = 0.32 * 0.0081 = 0.0026 moles. => Molar mass = 1.40 / 0.0026 = 540 g/mol = final answer. Am I doing correct? Please let me know!