Question

nitrogen gas (n₂) and hydrogen gas (h₂) combine to form ammonia (nh₃). which equation correctly represents this reaction? 2n₂ + h₂ → 3nh₃ n₂ + 3h₂ → 2nh₃ 2nh → n + 3h₂ n + h → nh

Explanation:

Step1: Count atoms on both sides

For \(N_2 + 3H_2
ightarrow2NH_3\), on the left - hand side, \(N\) atoms: \(2\) (from \(N_2\)), \(H\) atoms: \(3\times2 = 6\) (from \(3H_2\)). On the right - hand side, \(N\) atoms: \(2\times1=2\) (from \(2NH_3\)), \(H\) atoms: \(2\times3 = 6\) (from \(2NH_3\)).

Step2: Check other options

• For \(2N_2 + H_2

ightarrow3NH_3\), \(N\) atoms: \(2\times2 = 4\) (left), \(3\times1=3\) (right); \(H\) atoms: \(2\) (left), \(3\times3 = 9\) (right).

• For \(2NH

ightarrow N + 3H_2\), reactant \(NH\) is not correct formula (should be \(NH_3\) in this context of ammonia formation).

• For \(N + H

ightarrow NH\), \(N\) and \(H\) are not in their molecular forms (\(N_2\) and \(H_2\) as given in the problem statement).

Answer:

N₂ + 3H₂ → 2NH₃