Nitrogen reacted with hydrogen when heated on the catalyst. The resulting gas was absorbed with a nitric acid solution

Nitrogen reacted with hydrogen when heated on the catalyst. The resulting gas was absorbed with a nitric acid solution, evaporated to dryness, and the resulting crystalline substance was divided into two parts. The first was decomposed at a temperature of 190-240C, while only one gas and water vapor was formed. The second part was heated with concentrated sodium hydroxide solution. Write the equations for the described reactions.

N2 + 3H2 → 2NH3
NH3 + HNO3 → NH4NO3
NH4NO3 → N2O + 2H2O
NH4NO3 + NaOH → NaNO3 + NH3↑ + H2O

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