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?

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 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 80^@C is lowered by 10 mm by dissolving 2g of a non- volatile substance in 78 g of benzene . The vapour pressure of pure benzene at 80^(@)C is 750 mm . The molecular mass of the substance will be _______ g mol ^(-1) ?

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?

In an experiment, 18.04 g of mannitol were dissolved in 100 g of water. The vapour pressure of water was lowered by 0.309 mm Hg from 17.535 mm Hg. Calculate the molar mass of mannitol.

At 298 K, 1000 cm^3 of a solution containing 4.34g of solute shows osmotic pressure of 2.55 atm., What is the molar mass of the solute.