Hydrocarbon contains 18.18% hydrogen and 81.82% carbon. One litre of this gas has the same mass as carbon dioxide. What is the molecular formula of this hydrocarbon?
Given the percentage composition of HC as
So the ratio of number if atoms of C and H in its molecule can will be
So the Empirical Formula of hydrocarbon is
As the mass of one litre of hydrocarbon is same as that of
Now let Molecular firmula of the HC be
Using molar mass of C and H the molar mass of the HC from its molecular formula is
Hence the molecular formula of HC is