Respuesta :

2H₂ + O₂ = 2H₂O

m(O₂)=192 g
M(O₂)=32.0 g/mol
M(H₂)=2.02 g/mol

m(H₂)/2M(H₂)=m(O₂)/M(O₂)

m(H₂)=2M(H₂)m(O₂)/M(O₂)

m(H₂)=2*2.02*192/32.0=24.24 g