Calculate the mass of a non-volatile solute of molar mass 40 which should be dissolved in 114g octane to reduce its vapour pressure to 60%

Calculate the mass of a non-volatile solute of molar mass 40gmol^(-1) which when disolved in 114g octane to reduce it vapour presure to 80%.

Calculate the mass of compound ( molar mass = 256 g mol^(-1) ) to be dissolved in 75 g of benzene to lower its freezing point by 0.48 K (Kf= 5.12 K kg mol^(-1)) .

Calculate the mass of ascorbic acid (Vitamin C, C_6H_8O_6) to be dissolved in 75g of acetic acid to lower its melting point by 1.5^@C . K_f = 3.9 K kg mol^-1

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.

Urea [NH_2)_2CO] forms an ideal solution in water. Calculate the vapour pressure of an aqueous solution containing 5% by mass of urea at 298K. At 298K, vapour pressure of water is 23.75 mm Hg.

Vapour pressure of pure water at 298K is 23.8 mm Hg. 50g of urea (NH_2CONH_2) is dissolved in 850 g of water. Calculate the vapour pressure of water for this solution and its relative lowering.

A solution of sucrose (molecular mass 342 u) is prepared by dissolving 6.84g in 100g of water at 298K. Calculate the osmotic pressure of the solution at 298K (Density of water at 298K + 1 g mL^-1 ).

A solution of sucrose (molecular mass 342 u) is prepared by dissolving 0.84g in100 g of water at 298 K. Calcuate the osmotic pressure of the solution at 298 K (Density of water at 298 K = 1 gmol^-1)

Calculate the mass percentage of benzene (C_6H_6) and carbon tetrachloride (CCl_4) if 22g of benzene is dissolved in 122g of carbon tetrachloride.

Ethylene glycol (molar mass = 62gmol^-1) is a common automobile antifreeze. Calculate the freezing point of a solution containing 12.4g of this substance in 100g of water. Would it be advisable to keep this susbtance in the car radiators during summer? Given K_f for water = 1.86 K kg//mol K_b for water = 0.612 K kg//mol