Write the equations of chemical reactions 1) Copper nitrate (II) when heated, decomposes into copper

Write the equations of chemical reactions 1) Copper nitrate (II) when heated, decomposes into copper oxide (I), nitrogen oxide (IV) and oxygen. 2) When heated, copper (II) hydroxide decomposes into copper (II) oxide and water. 3) Silver nitrate decomposes in light into silver, nitric oxide (IV) and oxygen. 4) When heated, sodium nitrate decomposes into sodium nitrite and oxygen.

1) 2Cu (N0₃) ₂ → 2CuO + 4N0₂ + 0₂ (above the arrow> 170 ° C)
2) Cu (OH) ₂ = CuO + H₂O (above the arrow t⁰)
3) 2AgNO₃ → Ag + 2NO₂ + O₂ (above the arrow> 170 ⁰С)
4) 2NaNO₃ → 2NaNO₂ + O₂ (above the arrow t⁰)