10 unbalanced synthesis reactions and decomposition reactions?

Unbalanced synthesis reactions:
1. H2 + O2 -> H2O
2. Fe + S -> FeS
3. Mg + Cl2 -> MgCl2
4. Na + Br2 -> NaBr
5. C + O2 -> CO2
6. Al + O2 -> Al2O3
7. Ca + N2 -> Ca3N2
8. K + F2 -> KF
9. Cu + S -> CuS
10. Zn + HCl -> ZnCl2 + H2

Unbalanced decomposition reactions:
1. H2O2 -> H2O + O2
2. CaCO3 -> CaO + CO2
3. NH4Cl -> NH3 + HCl
4. KClO3 -> KCl + O2
5. NaHCO3 -> Na2CO3 + H2O + CO2
6. Ag2O -> Ag + O2
7. FeSO4 -> Fe2O3 + SO2 + O2
8. H2SO4 -> H2O + SO3
9. Ca(NO3)2 -> CaO + NO2 + O2
10. Pb(NO3)2 -> PbO + NO2 + O2

Synthesis Reactions

1. 2 H2 + O2 -> H2O
2. Mg + 2 HCl -> MgCl2 + H2
3. Fe + 2 O2 -> Fe2O3
4. 2 Na + Cl2 -> 2 NaCl
5. 2 CuO + C -> 2 Cu + CO2

Decomposition Reactions

1. 2 H2O -> 2 H2 + O2
2. MgCl2 -> Mg + Cl2
3. Fe2O3 -> Fe + O2
4. 2 NaCl -> 2 Na + Cl2
5. 2 CuCO3 -> 2 CuO + CO2