Răspuns:
Explicație:
n = m : M
==> MCH4=12 + 4=16------> 16g/moli
n= 50 g : 16g/moli= 3,125 moli CH4
==> n= 44,8 L : 22,4 moli = 2moli SO2
====> 1mol H2 ------6,022.10²³molecule H2
xmoli H2----------2,3 .10²³molecule
x= n= 2,3 .10²³ : 6,022.10²³=0, 38 moli H2