Write the equation of the chemical reaction: a) with oxygen; b) iron oxide; c) sodium;

Write the equation of the chemical reaction: a) with oxygen; b) iron oxide; c) sodium; d) nitrogen (in the resulting compound, nitrogen is trivalent); e) nickel oxide

1) When hydrogen interacts with oxygen, water is formed.

2) When hydrogen is passed through iron (III) oxide, iron is reduced and water is formed.

3) In the reaction of sodium with hydrogen, sodium hydride is formed.

4) Nitrogen with hydrogen form ammonia.

5) The reaction of reduction of nickel from nickel oxide with hydrogen.