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A certain liquid X has a normal freezing point of 2.20C and a freezing point depression constant Kf=4.01=C g mol 1. A solution is prepared

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A certain liquid X has a normal freezing point of 2.20C and a freezing point depression constant Kf=4.01=C g mol 1. A solution is prepared by dissolving some urea (CH4N2O) in 400 . g of X. This solution freezes at 0.2.C. Calculate the mass of CH4N2O that was dissolved. Round your answer to 2 significant digits

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