CHEMISTRY
posted by KISHA .
2.05 Grams of a liquid vaporized at 80 c in a 1 liter flask and a pressure of 1 atm. what is the molar mass of the gas?

n = PV/RT
Remember T must be in kelvin, solve for n = number of mols.
Then n = grams/molar mass. You know n and grams, solve for molar mass.