Identify each substance in the following word equation as a reactants or product limestone—heat ——> lime +carbon dioxide

Explanation:

When we write a chemical reaction equation then species present on the left hand side represents the reactants. Whereas species present on the right hand side represent the products.

For example,

Here, limestone is the reactant whereas lime and carbon dioxide are the products.

Thus, we can conclude that limestone is the reactant. And, both lime and carbon dioxide are the products.

your picture is not part of the scientific method.

the answer is barium and copper bromide