5 5 5
CH4 + Cl2--> CH3Cl+HCl
3 6 3
CH4 + 2Cl2----> CH2Cl2 + 2HCl
2 6 2
CH4 + 3Cl2---> CHCL3 + 3HCl
1 4 1
CH4 + 4Cl2---> CCl4+4HCl
1 1
CH4..............>CH4
CIfrele puse deasupra substantelor reprezinta numar de moli
moli,total CH4= 12
moli,total Cl2= 21mol
12mol CH4..........21mol Cl2
168/22,4..mol...............x...........................calculeaza !!!!