A gas has a density of #3.18*g*L^-1# at a temperature of #347*K#, and a pressure of #1.2*atm#. What is its molecular mass?
We use the Ideal Gas equation to get
We assume ideality, and so
Let's just cancel out the units to see if we have got this right. I am not immune to mistakes.............
And this gives, I think, an answer of........