Calculate the relative molecular mass of a gas which has a density of 2.615g dm-3 at 298K and 101kPa
Ok so I’ve got the working out and the answer but I want to know why the volume is 1dm-3
V= 1dm-3
Moles = pV/rt
Moles = 101000*(1/1000) / 8.31*298
Moles = 0.0408
Mass= density * volume
Mass = 1*2.615
Mass= 2.615
Mr = mass /moles
Mr= 2.615 / 0.0408
Mr = 64.09
I understand the working out and everything but I just don’t know where the volume is from. Why is it 1dm3 ? Thanks