A solution is prepared by dissolving an unknown mass of urea, (NH2)2CO, in enough water to make 100.0 mL of solution. The osmotic pressure of the solution at 25.00 °C is 47.9 atm. How many grams of urea are in the solution?
A. 0.112 g
B. 11.8 g
C. 1.92 g
D. 14.9 g