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Explain what is the molecular formula of urea

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1. Urea has a mass percent composition of 20% C, 6.71% H, 46.65% N, and 26.64% O. A solution prepared by dissolving 1.62 g of urea in 100 g of water freezes at -0.5 degrees C. What is the molecular formula of urea? Kf for water = 1.86 degrees C/m.

2. An aqueous solution is prepared by dissolving a non-volatile solute C2H6O2 in 100 g water. What would be the boiling point, freezing point, and osmotic pressure of this solution if it has a vapor pressure of 20.5 torr at 25 degrees C? The vapor pressure of water at 25 degrees C is 23.78 torr. The density of the solution is 1.15 g/mL.

Reference no: EM13506726

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