The amount of urea to be dissolved in 500 ml of water (K =18.6 K mole-1 in 100g solvent) to produce a depression of 0.186°C in freezing point is
9g
6g
3g
0.3g
The amount of Urea to be dissolved is 500cc of water (Kf=1.86) to produce a depression of 0.186∘C in the freezing point is