# 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?

##### 1 Answer

Apr 3, 2017

#### Answer:

We use the Ideal Gas equation to get

#### Explanation:

We assume ideality, and so

On rearrangement,

But

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........