The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyete solid weighing 0.5g when added to 39.0 g of benzene (molar mass 78 g `mol^(-1)`. Vapour pressure of the solution, then, is 0.845 bar. What is the molar mass of the solid substance?

The vapour pressure of pure bronze at a certain temparature is 262atm. At the same temparature the V.P. of a solution containing 2.0g of non-volatile solid in 100g bronze is 256atm . What is the molecular mass of the solid?

1.5 g of a non-volatile non-electrolyte is dissolved in 50 g of benzene (K_b=2.5K kg mol^-1) . The elevation of boiling point of the solution is 0.75K. The molecular weigth of the solute is gmol^-1 is

An aqueous solution of 2% non-volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent. What is the molar mass of the solute?

1.00g of a non-electrolyte solute dissolved in 50g of benzene lowered the freezing point of benzene by 0.40K. The freezing point depression constant of benzene is 5.12K mol^-1 . Find the molar mass of the solute.

2.9 g of a gas at 95^(@)C occupied the same volume as 0.184 g of dihydrogen at 17^(@)C at the same pressure. What is the molar mass of the gas ?

34.05 mL of phosphorus vapour weighs 0.0625 g at 546 ∘ C and 0.1 bar pressure. What is the molar mass of phosphorus?

At some temperature the vapour pressure of pure benzene, C_(6) H_(6) is 0 . 256 bar and vapour pressure of toluene, C_(6) H_(5) CH_(3) is 0 . 0 925 bar, if the mole fraction of toluene in a solution is 0 . 60 (i) What is the total vapour pressure of the solution ? (ii) Calculate the composition of the vapour phase in terms of mole fraction.

At 298 K the vapour pressure of pure benzene C_(6) H_(6) is 0.256 bar and vapour pressure of pure toluene, C_(6)H_(8) is 0.925 bar. If the mole fraction of benzene in solution is 0 . 40 , find the total vapour pressure of solution. Also find the mole fraction of toluene in vapour phase

A solution sontain 8 g of a carbohydrate in 100 g of water has a density 1.025 g/mL and an osmotic pressure of 5 atm at 27^(@) C . What is the molar mass of the carbohydrate?

34.05 mL of phosphorus vapour weighs 0.0625 g at 546^(@)C and 0.1 bar pressure. What is the molar mass of phosphorus ?