n1 moli CH4 + Cl2 = CH3Cl + HCl
n2 moli CH4 + 2Cl2 = CH2Cl2 + 2HCl
n3 moli CH4 neractionat
n1 + n2 + n3 = 403,2/22,4 = 18 moli
n1/1 = n2/2 = n3/3 = 18/6 = 3 n1 = 3 moli n2 = 6 moli n3 = 9moli
n reactionat = n1 + n2 = 9 moli
PV = nRT V = 9·0,082·298/2 = 109,962