Read this page, which explains what information is given in a balanced chemical equation. Although balancing may seem easy, it can become quite difficult when there are multiple reactants and/or products. As a general rule, begin balancing the chemical equation with a unique atom, or one that is only found in one reactant and one product. Balance hydrogen and oxygen last; they usually present the biggest challenge. You must learn to properly balance equations, as you will need this skill in every chemistry course you take.