3. To 10 cm3 of benzene (density 0.879 g/ml) was added 0.5548 g of naphthalene. The solidification temperature of the resulting solution is 2.981 C. Determine the molar mass of naphthalene in benzene if the freezing point of pure benzene is 5.5 C and its heat of fusion is 127.4 J/g.

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