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When 20.0 grams of an unknown nonelectrolyte (i=1) compound are dissolved in 500.0 grams of benzene,...

When 20.0 grams of an unknown nonelectrolyte (i=1) compound are dissolved in 500.0 grams of benzene, the freezing point of the resulting solution is 3.77 °C. The freezing point of pure benzene is 5.444 °C and the Kf for benzene is 5.12 °C/m. What is the molar mass of the unknown compound?

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