Calcium was burned under nitrogen atmosphere. The resulting salt was decomposed with boiling water. The released gas was burned

Calcium was burned under nitrogen atmosphere. The resulting salt was decomposed with boiling water. The released gas was burned in oxygen in the presence of a catalyst, and a solution of hydrochloric acid was added to the suspension. Write the equations for the described reactions.

3Ca + N2 → Ca3N2
Ca3N2 + 6H2O → 3Ca(OH)2 + 2NH3↑
4NH3 + SO2 → 4NO + 6H2O
Ca(OH)2 + 2HCl → CaCl2 + 2H2O

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