Which chemical equation correctly represents the reaction that takes place when nitrogen gas and hydrogen gas are formed as ammonia decomposes?

Question

N(g) + H3(g) → NH3(g)
2N(g) + 3H2(g) → 2NH3(g)
2NH3(g) → N2(g) + 2H3(g)
2NH3(g) → N2(g) + 3H2(g)

Answer 1

The correct chemical equation that represents the decomposition of ammonia (NH3) into nitrogen gas (N2) and hydrogen gas (H2) is:

\[ 2NH3(g) \rightarrow N2(g) + 3H2(g) \]

So, the answer is:

2NH3(g) → N2(g) + 3H2(g)