Write the reaction equation: KNO3 → O2 → NO → NO2 → HNO3 → NO

Let’s compose the equations for the reactions of obtaining nitrogen compounds:
3KNO3 = 2KNO2 + O2 – the decomposition reaction occurs when heated;
O2 + N2 = 2NO – redox reaction (ORR);
2NO + O2 = 2NO2 – OBP;
2NO2 + H2O = HNO3 + HNO2 – OBP;
8HNO3 + 3Cu = 2NO + 3Cu (NO3) 2 + 4H2O – ОВР.
Nitrogen compounds are highly reactive and highly toxic. Potassium nitrate – in the composition of mineral fertilizers. Nitric acid and nitrogen oxides are used in the synthesis of inorganic substances.