Question

the density of gas was measured at 1,50atm and at 27 DEGREES CELCIUS AND FOUND TO BE 1.95G/L CALCULATE THE MOLAR MASS OF THE GAS

Answer 1

PV = nRT

PV = (grams/molar mass)RT
P*molar mass = (grams/L)RT but g/L = density so
P*molar mass = density*RT
Plug in the numbers and solve for molar mass. R = 0.08205 L*atm and T = (C+ 273) = 300 K
Post your work if you get stuck.