20cm^3 of gaseous hydrocarbon completely burnt in excess of
oxygen, 60cm^3 of carbon dioxide and 40cm^3 of water vapour were
formed.What is the formula of the hrydocarbon?
Because we do not do homework for students (get a paid
tutor for that purpose), I will instead give guidance rather than a
full worked solution.
Find the moles of hydrocarbon
reactant.
Find the moles of carbon in the carbon dioxide
generated. Divide this value by the moles of hydrocarbon
reactant present.
Find the moles of hydrogen in the water vapour
generated. Divide this value by the moles of hydrocarbon reactant
present.
The ratio of C to H in the products is equivalent to the
ratio of C to H in the reactants. Therefore find the empirical
and/or molecular formulae.
If you like, you can post your working here for me to check.