Author Question: A 0.286-g sample of gas occupies 125 mL at 60. cm of Hg and 25C. What is the molar mass of the gas? ... (Read 140 times)

lilldybug07 · **on:** Aug 27, 2018

A 0.286-g sample of gas occupies 125 mL at 60. cm of Hg and 25C. What is the molar mass of the gas?

A) 5.9 g/mol
B) 44 g/mol
C) 59 g/mol
D) 71 g/mol

Question 2

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