A solution is prepared by dissolving 6.00 g of an unknown nonelectrolyte in enough water to make 1.00 L of sol?

A solution is prepared by dissolving 6.00 g of an unknown nonelectrolyte in enough water to make 1.00 L of solution. The osmotic pressure of this solution is 0.750 atm at 25.0�C. What is the molar m of the unknown solute (R = 0.0821 L�atm/K�mol)?