Question

The molecules of the alkene family are represented by a general formula C_nH_2n. Answer the following:

What is the molecular formula of the alkene if there are ten H atoms in it? 

Answer 1

H atoms = 2n = 10

n = `10/2`

∴ n = 5 = carbon atoms

∴ Molecular formula of alkene is C₅H₁₀.