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The freezing point depression constant kf for ethanol is

A solution was prepared by dissolving 9.54 g of dry ice (CO2) in 250.0 mL ethanol (C2H5OH). The freezing point depression constant (Kf) for ethanol is 1.99 ºC/m and pure ethanol's freezing point is -114.6 ºC. The density of ethanol is 0.789 g/mL. How much did the dry ice depress ethanol's freezingpoint?

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Chemistry: The freezing point depression constant kf for ethanol is

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