Which of the following balanced chemical equations below best represents the following "word" equation: Nitrogen gas reacts with hydrogen gas to produce ammonia.

N2 + 3H2 - -> 2NH3

N + 2H2 - -> 2NH

N2 + H2 - -> NH3

N2 + 2H - -> 2NH3

The answer to your question is the first option

Explanation:

According to the "word"equation:

Reactants = Nitrogen gas = N₂ (g)

Hydrogen gas = H₂ (g)

Products = Ammonia = NH₃

Reaction

N₂ (g) + H₂ (g) ⇒ NH₃

Now, we have to balance it

Reactants Elements Products

2 N 1

2 H 3

This reaction is unbalanced.

Multiply NH₃ by 2 and H₂ by 3

N₂ (g) + 3 H₂ (g) ⇒ 2 NH₃

Now, we have to balance it

Reactants Elements Products

2 N 2

6 H 6

Now the reaction is balanced