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17. A solution containing 10 g per

dm3  of urea is isotonic with a 5 % solution of a nonvolatile solute. The molecular mass of this nonvolatile solute is

a. 350 g mol-1

b. 200 g mol-1

c. 250 g  mol-1

d. 300 g mol-1

Ans. d

(10)

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