What is the equilibrium constant expression for the given reaction?

Option (c) is the correct answer.

Explanation:

At equilibrium the relationship expressed between the amounts of concentration of products and reactants in a reversible chemical reaction is known as equilibrium constant.

The concentration of solids and liquids is considered equal to 1 in equilibrium constant.

For example, in the given reaction

Therefore, its equilibrium constant will be as follows.

Here concentration of and CaO is 1 as these are solids.

Thus, equilibrium constant expression will be as follows.

it's c. elements are placed in rows based on how may valencies electrons have.

58750.08068 is the answer i think