A solution of lactose containing 8.45 g of lactose in 100 g of water has a vapour pressure of 4.5 mm of Hg at ` 0^(@) C ` . If the vapour pressure of pure water is ` 4.579 mm ` of Hg . Calculate the molar mass of lactose.

A solution of lactose containing 8.45 g of lactose in 100g of water has a vapour pressure of 4.559 mm of Hg at 0^(@)C . If the vapour pressure of pure water is 4.579 of Hg, calculate the molecular weight of lactose.

A solution containing 8.44 g of sucrose in 100 g of water has a vapour pressure 4.56 mm of Hg at 273K. If the vapour pressure of pure water is 4.58 mm of Hg at the same temperature, calculate the molecular weight of sucrose.

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?

How many grams of glucose are required to prepare an aqueous solution of glucose having a vapour pressure of 23.324 mm Hg at 25^@ C in 100 g of water ? The vapour pressure of pure water at 25^@C is 23.8 mm Hg. (Molar mass of glucose =180 mol ^(-1) )

When 25g of a non-volatile solute is dissolved in 100g of water, the vapour pressure is lowered by 0.225 mm. If the vapour pressure of water at 25^(@)C is 17.5 mm, what is the molecular mass of solute ?