The balanced reaction is 3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s ).
Step-by-step explanation:
A chemical equation is said to be balanced when the total number of atoms present on the reactants side is equal to the total number of atoms present on the product side.
The unbalanced chemical equation is as follows,
Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
To balance this equation, you need to look at how many atoms of each element are present on each side of the chemical equation.
Calcium has 1 atom on the reactant and 3 on the products side. To balance the reaction we need to multiply the calcium atom by 3 on the reactants side.
3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
Now Nitrogen has a coefficient of 2 on both sides of the reaction. Hence the balanced chemical equation will thus be
3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )