What is meant by the molality of a solution. Find the molecular weight of a solute where 1.2gm of the solute is dissolved in 180g water at `25^@C` shows vp of 36mm of Hg. VP of pure water at `25^@C` is 37.5 mm of Hg.

Find the molecular weight of a solute when 1.2 gm of the solute is dissolved in water at 25^@C in 37.4 mm of Hg.

Find the osmotic pressure of a solution at 27^@C when 10 gm Glucose and 6 gm urea is dissolved in 500 ml water.

What is the molality of a solution containing 200 mg of urea (molar mass 60g mol^(-1)) dissolved in 40g of water?

0.387 gm of a biopolymer when dissolved in 100 ml water at 27^@C shows an osmotic pressure of 4.2 atm find the molecular weight of the biopolymer.

The vapour pressure lowering caused by the addition of 100 g of sucrose (molecular mass = 342) to 1000 g of water, if the vapour pressure of pure water at 25^@C is 23.8 mm Hg, is

A solution of 2.44xx10^-3 kg of a nonelectrolyte solute dissolved in 0.075 kg of water boiled at 100.413^@C . Calculate the molecular mass of the solute. K_b for water = 0.52 K kg mol^-1

6.0 g of urea (molecular weight=60) was dissolved in 9.9 moles of water. If the vapour pressure of pure water is P^@ , the vapour pressure of solution is :

At 25^@C , the solubility product of Hg_2Cl_2 in water is 3.2xx10^-17 mol^3 dm^-9 . What is the solubility of Hg_2Cl_2 in water at 25^@C ?

A very small amount of a nonvolatile solute (that does not dissociate) is dissolved in 56.8 cm^3 of benzene (density 0.889 g cm^-3 ). At room temperature, vapour pressure of this solution is 98.88 mm Hg while that of benzene is 100 mm Hg. Find the molality of this solution. If the freezing temperature of this solution is 0.73 degree lower than that of benzene, what is the value of molar freezing point depression constant of benzene ?