Question

In a chemical reaction one molecule of nitrogen reacts with three molecules of hydrogen to form
ammonia. If the law of conservation of mass is correct what will be the number of atoms of nitrogen
and hydrogen at the end of the reaction?

Answer 1

Answer:

N=1 H=3

Explanation:

Answer 2

Given,

In a chemical reaction, one molecule of nitrogen reacts with three molecules of hydrogen to form ammonia.

To find,

If the law of conservation of mass is correct, what will be the number of nitrogen and hydrogen atoms at the end of the reaction.

Solution,

The number of atoms of nitrogen at the end of the reaction will be 2xNₐ atoms.

The number of atoms of hydrogen at the end of the reaction will be 6xNₐ atoms.

We can simply solve this numerical problem by the following procedure.

The reaction of nitrogen and hydrogen in the unbalanced form can be written as;

N₂ + H₂ ⇄ NH₃

It is given in the question that one molecule of nitrogen reacts with three molecules of hydrogen. Thus,

N₂ + 3H₂ ⇄ 2NH₃

This reaction is balanced according to the law of conservation of mass.

Now, we have to calculate the number of atoms of nitrogen and hydrogen at the end of the reaction.

Thus,

We can see that at the end of the reaction, we are only left with 2NH₃.

This means that we have 2xNₐ atoms of Nitrogen and 6xNₐ atoms of Hydrogen. (Nₐ= Avogadro's Number)