Question

The two reactants combine to form a single product, ammonia, nh3, which is not shown. write a balanced chemical equation for the reaction. based on the equation and the contents of the left (reactants) box how many molecules should be shown in the right (products) box?

Answer 1

If the product is ammonia, the reactants must be the diatomic gases N₂ and H₂. The complete balanced reaction is shown below:

N₂ + 3 H₂ → 2 NH₃

Now, the number of molecules on the left or reactant side are: 2 molecules of nitrogen and 3*3 = 6 molecules of hydrogen. The total number would be 8 molecules. The same number of molecules is counted on the right or product side. This is to obey the Law of Conservation of Mass.

Answer 2

In a combination reaction, the two or more reactants combine chemically to react and form a single product. It can be represented as $\rm A + B \rightarrow AB$.

Eight molecules will be present on the right side of the reaction where the product is formed.

How to write the combination reaction for ammonia?

Ammonia $\rm (NH_{3})$ is formed when diatomic nitrogen $\rm (N_{2})$ reacts chemically with the water $\rm (H_{2})$ molecules.

It can be represented as:

$\rm N_{2} + 3 H_{2} \rightarrow 2 NH_{3}$

The molecules on the reactant side or the left side of the reaction is 2 of nitrogen and 6 of water therefore, a total of eight molecules.

The reaction will be balanced only when the number of molecules is equal on the product side therefore, eight molecules will be present on the right side of the equation.

Thus, 8 molecules are present on the right side of the equation.

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