34.05 mL of phosphorus vapour weighs 0.0625g at `546^@C` and 1 bar pressure. What is the molar mass of phosphorus?

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

A vessel of 100 ml capacity contains a gas at 30^@C at 1.5 bar pressure . The gas is transferred to another vessel of volume 150 ml at 30^@C What would be its pressure?

100 mg of a protein is dissolved in just enough water to make 10.0 mL of solution. If this solution has an osmotic pressure of 13.3mm Hg at 25^@C , what is the molar mass of the protein? (R = 0.0821L atm mol^-1 K^-1 and 760mm Hg = 1atm)

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

100 g of liquid A (molar mass 140 g mol^-1) was dissolved in 1000g of liquid B (molar mass 180 g mol^-1) . The vapour pressure of pure liquid B was found to be 500 torr: Calculate the vapour pressure of pure liquid A and its vapour pressure in the solution if the total vapour pressure of the solution is 475 Torr.

If the density of pure water is 1g/ml then what is the molarity of water?

A solution containing 30g of non-volatile solute exactly in 90g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate: molar mass of the solute

Heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components are 105.2 kPa and 46.8 kPa respectively. What will be the vapour pressure of a mixture of 26.0 g of heptane and 35 g of octane?

A solution containing 30 g of non-volatile solute exactly in 90g of water has a vapour presure of 2.8K Pa at 298K. Further 10g of water is added to this solution. The new vapour pressure becomes 2.9K Pa at 298K. Calculate 298K. The molar mass of the solute

2000 cm^3 of an aqueous solution of a protein contains 1.26 g of the protein. The osmotic pressure of such a solution at 300K is found to be 2.57 … 10^(-3) bar. Calculate the molar mass of the protein.