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A pure sample of the solvent phenol has a freezing point of 40.85°C. A 0.415 molal solution of an unknown in phenol was observed to have a freezing point of 38.05°C. a)Find the freezing point depression (?Tf) of the solution? b) Calculate the freezing point depression constant (Kf) of phenol ? c)If 24.5899g of unknown was added to 838.72g of phenol to prepare the solution, calculate the molar mass (MM) of the unknown.

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