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The molal boiling point elevation constant Kb=0.56Ckgmol1 for a certain substance X. When 21.g of urea ((NH2)2CO) are dissolved in 400 . g of X,

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The molal boiling point elevation constant Kb=0.56Ckgmol1 for a certain substance X. When 21.g of urea ((NH2)2CO) are dissolved in 400 . g of X, the solution boils at 141.8C. Calculate the boiling point of pure X. Be sure your answer has the correct number of significant digits

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