4 Ag + O2 = 2 Ag2O
Mg + 2 HNO3 = H2 + Mg(NO3)2
CH4 = C + 2 H2
AL(OH)3 + 3 HNO3 = AL(NO3)3 + 3 H2O
2 CaO = 2 Ca + O2
NaOH + CuCl2 = NaCl2 + Cu(OH)
Al2O3 + 6 HCl = 2 AlCl3 + 3 H2O
6 Ag + N2 = 2 Ag3N
Mg(OH)2 + HNO3 = H2O + Mg(NO3)2
2 AlCl3 + 3 H2 = 2 Al + 6 HCl
H3PO4 + CaCl2 = Ca3(PO4)2 + HCl
2 Fe + 3 Cl2 = 2 FeCl3
2 Cr2O3 = 4 Cr + 3 O2