A substance formed as a result of a chemical reaction is called a product.

Here's a simple explanation:

* Reactants: The starting materials in a chemical reaction.

* Product: The new substance(s) formed by the reaction.

For example:

* Reactants: Hydrogen gas (H₂) and Oxygen gas (O₂)

* Chemical Reaction: Burning or combustion

* Product: Water (H₂O)