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

The vapour pressure of benzene at a certain temperature is 640 mm of Hg non-volayile and non--elecrolyte solute weighing 2.175 g is added to 39.08 g of benzene . The vapour pressure of the soution is 600 mm of Hg . The molar mass of the solute is _____ g mol ^(-1)

The vapour pressure of pure benzene (molar mass 78 g/mol) at a certain temperature is 640 mm Hg, A nonvolatile solute of mass 2.315g is added to 49 g of benzene. The vapour pressure of the solution is 600 mm Hg. What is the molar mass of solute?

At 0^@C , the detiny of a certain oxide of a gas at 2 bar is same as that of dinitrogen at 5 bar. What is the molecular mass of the oxide?

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

The vapour pressure of acetone at 20^(@) C is 185 torr when 1.2 g of a non - volattile substance was dissolved in 100 g of acetone at 20^(@) C ,its vapour pressure was 183 torr . The molar mass ( g mol ^(-1) ) of the substance . is molar mass ( g mol ^(-1)) of the substance is ______.

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

A solutions is prepared by dissolving 394 g of a nonvolatile solute in 622 g of water. The vapour pressure of solution is found to be 30.74 mm Hg at 30^@C . If vapour pressure of water at 30^@C is 31.8mm Hg, what is the molar mass of solute?

The vapour pressure of 2.1% solution of a non-electrolyte in water at 100^@C is 755 mm Hg. Calculate the molar mass of the solute. (58.69 g mol^(-1)