Topical Questions
These questions are keyed to the major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
Calculate the mass in grams of urea, CO(NH2)2, that must be added to 150. g water to give a solution whose vapor pressure is 2.5 mm Hg less than that of pure water at 40 °C (vp H2O at 40 °C = 55.34 mm Hg).
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