Solved: Urea is a white crystalline solid used as a fertilizer, in the pharmaceutical

Chapter 13, Problem 13.149

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Urea is a white crystalline solid used as a fertilizer, in the pharmaceutical industry, and in the manufacture of certain polymer resins. Analysis of urea reveals that, by mass, it is 20.1% carbon, 6.7% hydrogen, 46.5% nitrogen and the balance oxygen. (a) Find the empirical formula of urea. (b) A 5.0 g/L solution of urea in water has an osmotic pressure of 2.04 atm, measured at 25_C. What is the molar mass and molecular formula of urea?

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