Which choice best represents a balanced equation for the reaction of nitrogen gas with hydrogen gas to produce ammonia group of answer choices?

The representation of a chemical reaction in the form of symbols (substances) is known as a chemical equation. A chemical equation consists of reactants, products and an arrow showing the direction of the reaction. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as the balanced chemical equation.

There are 2 N on the left and only one on the right. A coefficient of 2 for NH3 will satisfy the mass requirements.

This reaction is the synthesis of Ammonia using Nitrogen and Hydrogen gas.

#N + H -> NH_3#

We must remember that Nitrogen and Hydrogen are both diatomic molecules in their standard gas form. This adjusts the equation to

#N_2 + H_2 -> NH_3#

Now we need to adjust coefficients in order to balance the atoms on each side of the equation. Currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

We can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

#N_2 + 3H_2 -> 2NH_3#

This gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.

I hope this was helpful.
SMARTERTEACHER