). These tell you how many atoms of that element are in a single molecule. when balancing, or you'll change the substance itself.
This is because you have two oxygen atoms on the left but only one on the right. To fix it, we add coefficients: what is a balanced chemical equation
The foundation of balancing equations is the . This scientific principle states that matter cannot be created or destroyed in a closed system. In chemistry terms, the atoms you start with (reactants) must equal the atoms you end with (products)—they just get rearranged into new substances. The Anatomy of an Equation This is because you have two oxygen atoms
). These tell you how many molecules of that substance are involved. You balance equations by adjusting these numbers. A Quick Example: Making Water If you look at the raw reaction for making water: In chemistry terms, the atoms you start with