3x moli CH3Cl, 2X moli CH2Cl2, X moli CH4 NEREACTIONAT
CH4+Cl2=CH3Cl+HCL, 3x moli CH3Cl se obtin din 3X moli CH4
CH4+2Cl2=CH2Cl2+2HCL, 2x moli CH2Cl2 se obtin din 2X moli CH4
nCH4 initial: 3X+2X+X=6X
V CH4 initial: 6x*22.4=336 -> x=2,5
n CH2Cl2= 2*2.5=5moli
m CH2Cl2=5*85=425g