Cm = n/Vs => n = CmxVs = 2x3,5 = 7 moli HCl dizolvat in solutie.
x 1x moli 2x
CH4 + 2Cl2 --> CH2Cl2 + 2HCl
1 1 2
3x 3x moli 12x
CH4 + 4Cl2 --> CCl4 + 4HCl
1 1 4
4x 4x moli
CH4 ------------> CH4 nereactionat
1 1
=> HCl = 2x + 12x = 14x moli formati
=> 14x = 7 => x = 0,5
=> CH4 = x+3x+4x = 8x = 8*0,5 = 4 moli introdusi
V = nxVm = 4x22,4 = 89,6 L CH4