According to the Law of Conservation of Matter (also sometimes called the Law of Conservation of Mass), if there are 3 atoms of Oxygen on the REACTANTS side of a chemical equation, how many atoms of Oxygen must there be on the PRODUCTS side of the equation?

if there are three on one side and there is usually two on both side then there would be three on the product side.

There are now two oxygen atoms on each side of the equation. This point is so important that we should repeat it. You cannot change the formula of a chemical substance to balance a chemical reaction! You must use the proper chemical formula of the substance.

Explanation:

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