notam compusul CaHbClc
d.H2 = miu.compu/miu.H2
=> miu.compus = d.H2xmiu.H2
= 62,5x2 = 125 g/mol
100% ..... 38,4% C ........ 56,8% Cl ...... 4,8% H
125 g ..... 12a C ............ 35,5c .............. b
=> a = 4 , b = 6 , c = 2
=> compusul este C4H6Cl2