C : 52,1 | :12 = 4,34 | : 1,24 = 3,5 |x2 = 7
H : 3,8 | :1 = 3,8 | : 1,24 = 3 |x2 = 6
Cl : 44,1 | :35,5 = 1,24 | : 1,24 = 1 |x2 = 2
formula bruta : (C7H6Cl2)n
M = 2·80,5 = 161g/mol (7·12+ 6·1+ 2·35,5)n = 161 n = 1
formula moleculara : C6H5-CHCl2 clorura de benziliden (diclorofenilmetan)