Scriem reactiile si notam cu x-moli CH4 care se transforma in CH3Cl
y-moli CH4 care se transforma in Ch2Cl2
Ch4 +Cl2----> CH3Cl + HCl
x.......x..............x
CH4 + 2Cl2---->CH2Cl2 + 2HCl
y...........2y...........y
Lucram in volume
x+y=1
x+2y=1,4
y=0,4
x=0,6
x:y=0,6:0,4=6:4=3:2=1,5:1