The vapour pressure of pure benzene is `639.7 mm Hg` and the vapour pressure of solution of a solute in benzene at the temperature is `631.9 mm Hg`. Calculate the molality of the solution.

The vapour pressure of pure benzene at 25^(@)C is 639.7 mm Hg and vapour pressure of a solution of solute in benzene at the same temperature is 631.9 mm Hg. Calculate the molality of the solution.

The vapour pressure of pure benzene at 25^@C is 639.7 mm of Hg and the vapour pressure of a solution of a solute in C_6H_6 at the same tempeature is 631.9 mm of Hg. Calculate molality of solution.

The vapour pressure of pure benzene at 25^@C is 640.0 mm Hg and vapour pressure of a solution of a solute in benzene is 25^@C is 632.0 mm Hg. Find the freezing point of the solution if k_f for benzene is 5.12 K/m. (T_("benzene")^@ = 5.5^@C)

The vapour pressure of pure benzene at 25^@C is 640.0 mm Hg and vapour pressure of a solution of a solute in benzene is 25^@C is 632.0 mm Hg. Find the freezing point of the solution if k_f for benzene is 5.12 K/m. (T_("benzene")^@ = 5.5^@C)

The vapour pressure of water is 17.54mm Hg at 293 K. Calculate vapour pressure of 0.5 molal solution of a solute in it.

The vapour pressure of pure benzene is 640 mm at 298K. A solution of a solute in benzene shows a vapour pressure of 630 mm at the same temperature. Then the mole fraction of the solute is