When 72.1 g of urea CH4N2O are dissolved in 600. g of a certain mystery liquid X, the freezing point of the solution is

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When 72.1 g of urea CH4N2O are dissolved in 600. g of a certainmystery liquid X, the freezing point of the solution is 4.0 °Clower than the freezing point of pure X. On the other hand, when72.1 g of iron(III) nitrate FeNO33 are dissolved in the same massof X, the freezing point of the solution is 3.7°C lower than thefreezing point of pure X. Calculate the van't Hoff factor foriron(III) nitrate in X. Be sure your answer has a unit symbol, ifnecessary, and round your answer to 2 significant digits.