What weight of the non volatile urea `(NH_2CONH_2)` must be dissolved in 100g water in order to decrease its vapour pressure by 25%?

Calculate the weight of non volatile solute (mw=90) which should be dissolved in 180g water to reduce its vapour pressure to 80%.

6 g urea is dissolved in 90 g water. The relative lowering of vapour pressure is equal to:

10g of a non-volatile solute was dissolved in 100g water at 20^@ C. the vapour pressure was lowered from 17.35 to 17.23 mm. calculate molecular mass of the solute.

The vapour pressure of a solvent decreased by 10 mm. of Hg when a non-volatile solute was added to the solvent. The mole fraction of solute in solution is 0.2, what would be the mole fraction of solvent if decrease in vapour pressure is 20 mm of Hg:

What do you mean by relative lowering of vapour pressure? Calculate the relative lowering of Vapour pressure of a solution formed by dissolving 50 g of urea (NH_2 CONH_2) in 850g of water.(Given vapour pressure of pure water at 298K= 23.8mm of Hg.)

How many grams of glucose must be dissolved in 0.5 lit water for its osmotic pressure to be same us that of a solution of 12g urea in 250ml water.