An Aqueous Solution Made by Dissolving 168 Mg of an Unknown

An aqueous solution made by dissolving 168 mg of an unknown compound (a nonelectrolyte) in enough water to make 500.0 mL of solution, develops an osmotic pressure of 5.22 torr at a temperature of 23.5°C. What is the molecular mass of this unknown compound?Hint: Find molarity, then moles, then molar mass, being sure to keep track of units.

A) 94.3 g mol^-1
B) 124 g mol^-1
C) 943 g mol^-1
D) 1.19 × 10³ g mol^-1
E) 1.57 × 10³ g mol^-1