I'm alright with these questions but this question seems to be odd since it wants me to find something different.
At 273K 101000Pa, 6.319g of a gas occupies 2.00 dm^3. Calculate the relative molecular mass of the gas."
I think that firstly you would convert the dm^3 into m^3.
But I'm thinking this is a trick question because no value is given for moles and that it could potentially be a way of indirectly saying to find the number of moles in this gas. But then why would add in a mass for the gas as a value if we aren't using it?