The molecular mass of hemoglobin is 6.86 x 104 g/mol.  What mass of hemoglobin must be present per 100.0 mL of a solution to exert an osmotic pressure of 7.25 mmHg at 25 ºC?

If 57.22 mg of Na2SO4 (formula mass = 142.02 g/mol) is dissolved in 36.64 mL. What is the osmotic pressure of this solution at 29.21 °C. Assume any salt is completely ionic!

1) What is the molality of a solution prepared by dissolving 78.8  g of ethylene glycol, HOCH2CH2OH, in 1.45  L of water? Assume the density of water is 1.00 g/mL. 2)The concentrations of Al  and K  in a sample of riverwater are 0.0500 mg/kg and 1.30 mg/kg, respectively. Express the concentration in molality.   3) What molality of nonvolatile solute is needed to lower the melting point of camphor by 1.050°C? (Kf = 39.70ºC/m)   4) Determine the melting point of an aqueous solution containing 193 mg of saccharin (C7H5O3NS) added to 1.00 mL of water (density of water = 1.00 g/mL, Kf = 1.86°C/m).   5) Which one of the following aqueous solutions should have the lowest freezing point? a. 0.0150 m Na2SO4 b. 0.0300 m KBr c. 0.00500 m C6H12O6   5) From your predicted value of the van't Hoff factor, calculate the boiling point of a 1.64  m aqueous solution of barium nitrate, Ba(NO3)2. The Kb of water is 0.52°C/m.

At 25.0 °C, 100.0 mL of an aqueous solution containing 45.2 mg of a molecular solute has an osmotic pressure of 18.4 Torr. The molar mass of the solute is ___ g/mol.

A 4.1x102 mg sample of a protein is dissolved in water to make 0.25 mL of solution. The osmotic pressure of the solution is 0.56 torr at 25° C. What is the molar mass of the protein? g/mol

A 267−mL benzene solution containing 2.27 g of an organic polymer has an osmotic pressure of 7.37 mm Hg at 13°C. Calculate the molar mass of the polymer.

At 31°C, what is the osmotic pressure of a 0.2% NaCl by weight aqueous solution? Assume the density of the solution is 1.0 g/mL. (R = 0.0821 L · atm/(K · mol))

An isotonic solution is prepared by dissolving 4.50 g NaCl (molar mass = 58.44 g/mol) in 500. mL of solution. What is the osmotic pressure of the solution at 37oC?

What is the molality of 14.5 g of MgSO4 in 285.5 mL of water at 40 °C?

If 11.2 g of naphthalene, C 10H 8 (Molar mass= 128 g/mol), is dissolved in 107.8 g of chloroform, CHCI 3 (Molar mass = 118 g/mol), what is the molality of the solution? 0.0875 m 12.4 m 0.811 m 0.0941 m 0.0969 m