A Solution Is Prepared by Adding 40 $55 ^ { \circ } \mathrm { C }$

question 134

Multiple Choice

A solution is prepared by adding 40.00 g of lactose (milk sugar) to 110.0 g of water at $55 ^ { \circ } \mathrm { C }$ The partial pressure of water above the solution is ________ Torr.The vapour pressure of pure water at 55 °C is 0.1553 bar.The MW of lactose is $342.3 \mathrm {~g} \mathrm {~mol} ^ { - 1 }$

• A)118.7
• B)8.268
• C)19.08
• D)2.188
• E)114.3