At room temperature, a dilute solution of urea is prepared by dissolving 0.60 g of urea in 360 g of water. If the vapour pressure of pure water at this temperature is 35 mmHg, lowering of vapour pressure will be:
(Molar mass of urea = 60 g mol-1)1
0.027 mm Hg
2
0.028 mm Hg
3
0.017 mm Hg
4
0.031 mm Hg