Объяснение:
4Li+O2--->2Li2O.
Si+O2--->SiO2.
2H2+O2--->2H2O.
H2S+O2--->2S+2H2O.
PH3+O2--->P2O5+H2O.
2ZnS+3O2--->2ZnO+2SO2.
