Final answer:
The equation that illustrates the law of conservation of matter is Reactants → Products. This equation shows that the total mass of the reactants and products remains the same in a chemical reaction.
Step-by-step explanation:
The equation that illustrates the law of conservation of matter is:
Reactants → Products
This equation shows that the reactants on the left side of the arrow are transformed into products on the right side of the arrow, but the total mass of the reactants and products remains the same. This law states that matter cannot be created or destroyed in a chemical reaction.