00-gram sample of a biological material was dissolved in enough water to give 100.0 mL of a solution. The osmotic pressure of the solution was 2.80...

A 1.00-gram sample of a biological material was dissolved in enough water to give 100.0 mL of a solution. The osmotic pressure of the solution was 2.80 torr at 25 degrees Celsius. Calculate the molarity and the approximate molecular weight of the material.