Answer :
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
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