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When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3.77°C. The freezing point of pure benzene is 5.48°C, and Kf for benzene is 5.12°C/m. What is the molecular weight of the unknown?

120 g/mol

80.0 g/mol

100 g/mol

140 g/mol

160 g/mol

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Category:- Chemistry
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