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6.0 g urea (60 g/mol) in 90 g water; pure water p = 25.0 mm Hg. Solution p?
A25.5 mm Hg
B24.0 mm Hg
C24.5 mm Hg
D23.5 mm Hg
Answer & Solution
Correct answer: C. 24.5 mm Hg
Urea is 0.1 mol and water 5.0 mol, so x(water) = 5.0/5.1 and p = 25.0 × 0.980 = 24.5 mm Hg.
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