- 2Cu+O2→to2CuO2Cu+O2→to2CuO{2}{C}{u} + {O}_{2} \overrightarrow{t}^{o} {2}{C}{u}{O}
- 3Fe+3O2→toFe3O4{3}{F}{e} + {3}{O}_{2} \overrightarrow{t}^{o} {F}{e}_{3}{O}_{4}
- Mg+S→toMgS{M}{g} + {S} \overrightarrow{t}^{o} {M}{g}{S}
- FeO+2HCl→FeCl2+H2O{F}{e}{O}+ {2}{H}{C}{l} → {F}{e}{C}{l}_{2} + {H}_{2}{O}