A 2.00 gram sample of gas at 27.0 0C and 1.00 atm occupies 1.00 L. What is the molecular weight of the gas?
Use PV = nRT and solve for n = number of moles. then
n = moles = grams/molar mass. You have n and grams. solve for molar mass.
n = moles = grams/molar mass. You have n and grams. solve for molar mass.