Arrange the following in order of decreasing volume (at s.t.p) putting the greatest volume first

Question

i. one gram of carbon dioxide

ii. one gram of hydrogen

iii. one gram of chlorine gas

iv. one gram of methane

Answer 1

Since PV = nRT:

Rearranged: V= nRT/P

Since its at S.T.P we can ignore Temperature, Pressure and the gas constant.

So: V = n

The volume depends on the number of mols.

So the order must be the order of their molar masses : iii > i > iv > ii