This is because you have two oxygen atoms on the left but only one on the right. To fix it, we add coefficients:
: Add numbers in front of formulas to equalize the atom counts. It’s often easiest to save Hydrogen and Oxygen for last. 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
: List how many atoms of each element are on the reactant (left) and product (right) sides. The foundation of balancing equations is the
). 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: