1.

The amount of urea to be dissolved in 500 ml of water (K = 18.6 K "mole"^(-1) in 100 g solvent) to produce a depression of 0.186^(@)C in freezing point is

Answer»

9 G
6 g
3 g
0.3 g

Solution :`Delta T_(f)=(100xx K xx W)/(m xx W) therefore 0.186 = (100xx18.6xx w)/(60xx500)`
w = 3 g


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