Look at the chemical equation:

3H2 + N2 → 2NH3

How many atoms of hydrogen (H) are present on both sides of the equation?

2

3

5

6

On both sides of the equation, there are 5 atoms of H

Explanation:

H₂ is a dyatomic molecule, so it has 2 atoms.

In ammonia, there are 3 atoms of H plus 1 atom of N.

6

Explanation:

Hello,

In this case, based on the given balanced chemical reaction, one notices that at the reactants there are six hydrogens as its stoichiometric coefficient is 3 and its subscript 2, therefore by multiplying the result is 6. On the other hand, at the products, we see 2 as the ammonia's stoichiometric coefficient and 3 as the hydrogen's subscript, therefore, by multiplying the result is 6 which substantiates the reaction as correctly balanced.

Best regards.