A sample of gas with a mass of 1.62 g occupies a volume of 941 mL at a pressure of 748 torr and a temperature of 20.0 C. What is the molar mass of the gas?

Answer 1

Use PV = nRT and solve for n = number of mols. Then n = grams/molar mass and solve for molar mass.
Remember T must be in kelvin, volume in L, and P in atmospheres.

Answer 2

42.1