设水x,氢yH2O===O+H218 = 16 =2x = 100=y得:x=112.5 y=12.5质量守恒定律
耗水125Kg,得氢气25Kg
m(H2O)=100kg*(18/16)=112.5kgm(H2)=112.5kg-100kg=12.5kg