A solution contains 2.45 g of a compound and 155 g water.   The freezing point of the pure solvent is 0.000 oC.  The solution has the freezing point of -0.550 oC.   Calculate molar mass of compound.  Kf for H2O : 1.36 oC kg / mole  i = 2  a. 172 g/ mole b. 145 g/ mole c. 78.2 g/ mole d. 22.0 g /mole

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