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Solution: 0.150 g of an unknown substance are added to water to make 1...

Question

0.150 g of an unknown substance are added to water to make 100.00 mL of solution. The osmotic pressure of the solution is measured to be 477.688 torr at 44.0 oC. What is the molecular weight of the solute? (R= 0.08206 L atm/mol K)

A. 8.62 g/mol
B. 91.34 g/mol
C. 24.18 g/mol
D. 67.05 g/mol
E. 62.08 g/mol