The following osmotic pressures were measured for solutions of a macromolecular material in water at 25C....

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The following osmotic pressures were measured for solutions of a macromolecular material in water at 25°C. Concentration (g/dm³) Osmotic pressure (cm solution) 0.35 0.60 0.80 0.95 20 38 55 70 Assume solution density = 1.05 g/cm³ in each case. Note that solutions are not ideal. Calculate an average molecular mass of the material. (500 g/mole) The following osmotic pressures were measured for solutions of a macromolecular material in water at 25°C. Concentration (g/dm³) Osmotic pressure (cm solution) 0.35 0.60 0.80 0.95 20 38 55 70 Assume solution density = 1.05 g/cm³ in each case. Note that solutions are not ideal. Calculate an average molecular mass of the material. (500 g/mole)