Write down one equation of the reactions of the compound and the decomposition

Write down one equation of the reactions of the compound and the decomposition to obtain: 1) Copper (II) oxide 2) Silicon (IV) oxide.

1. Copper oxide CuO can be obtained by the reaction of a compound between simple substances:
2Cu + O2 = 2CuO (compound)
Also, copper oxide CuO is released during the decomposition of the corresponding insoluble base – copper (II) hydroxide Cu (OH) 2:
Cu (OH) 2 = CuO + H2O (decomposition)

2. Silicon oxide SiO2 is produced in a similar way by a compound reaction between oxygen and silicon:
Si + O2 = SiO2 (compound)
It can also be obtained by decomposition of the insoluble acid H2SiO3:
H2SiO3 = H2O + SiO2 (decomposition)