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A certain substance X has a normal boiling point of 101.9C and a molal boiling point elevation constant Kb=0.71Ckgmol1. A solution is prepared by dissolving

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A certain substance X has a normal boiling point of 101.9C and a molal boiling point elevation constant Kb=0.71Ckgmol1. A solution is prepared by dissolving some urea ((NH2)2CO) in 500 . g of X. This solution boils at 103.0C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits

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