Dry air is slowly passed through three solutions of different concentrations, `C_(1),C_(2)` and `C_(3)`, each containing (non-volatile) `NaCl` as solute and water as solvent, as shown in the Fig. If the vessel `2` gains weight and the vesel `3` loses weight then:

In Ostwald and Walker's appratus, dry air is passed through a solution containing 20 gram of an organic non-volatile solute in 250 ml of water. Then the air was passed through pure water and then through a U-tube containing anhydroous CaCl_(2) . The mass lost in solution is 26 gram and the mass gained in the U-tube is 26.48 gram. Calculate the molecular mass of organic solute.

In Ostwald and Walker's appratus, dry air is passed through a solution containing 20 gram of an organic non-volatile solute in 250 ml of water. Then the air was passed through pure water and then through a U-tube containing anhydroous CaCl_(2) . The mass lost in solution is 26 gram and the mass gained in the U-tube is 26.48 gram. Calculate the molecular mass of organic solute.

6 g. of a non volatile solute is dissolved in 90g. of water, such that the lowering in vapour pressure is 2%. The molecular weight of the solute is

The vapour pressure of 4% solution of a non-volatile solute in water at 100^@C is 745 mm. What is the molecular weight of solute?

Dry air was successively passed through a solution of 5 g solute in 80 g water & then through pure water. The loss in weight of solution was 2.5 g & that of pure water was 0.04 g. What is the mol. wt. of solute ?