Add up the atomic masses of the atoms in the empirical formula. The empirical formula of a hydrocarbon is CH 2 and its M r is 42. the mass of the atoms in the empirical formula is 14 42 ÷ 14 = 3 ...

Hydrocarbons react with oxygen to create carbon dioxide and water which releases heat. Can be used to recap on combustion reactions for hydrocarbons or could lead into a classroom discussion on ...