n1 moli 2CH4 ⇒C2H2 + 3H2
n2 moli CH4 ⇒ C↓ + 2H2
n3 moli CH4 nereactionat
n1 + n2 + n3 = 10 moli
n1/2 + 3n1/2 + 2n2 + n3 = 18 n1+3n1+4n2+ 2n3 = 36 4n1 + 4n2 + 2n3 =36
n3/(n1/2) = 2/3 2n3/n1 = 2/3 n3 = n1/3
4n1/3 + n2 =10
7n1/3 + 2n2 = 18 n1/3 = 2 n1 = 6 moli
6·100 10 = 60%