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When 108. g of urea (CH4N2O) are dissolved in 1450,g of a certain mystery liquid X, the freezing point of the solution is 7.20C less than the. freezing point of pure X. Calculate the mass of iron(III) chioride that must be dissolved in the same mass of X to produce the same depression in freezing point. The van't Holf factor I=3.64 for iron(III) chloride in X. Be sure your answer has a unit symbol, if necessary, and is rounded to the correct number of significant digits