A Solution Is Prepared by Adding 40

Multiple Choice

A solution is prepared by adding 40.00 g of lactose (milk sugar) to 110.0 g of water at 55 °C The partial pressure of water above the solution is ________ torr. The vapor pressure of pure water at 55 °C is 118.0 torr. The MW of lactose is 342.3 g/mol.

A) 2.216
B) 125.5
C) 225.9
D) 115.8
E) 86.5