In a chemical reaction, ____ react to make ____. However, products can also ____ to form the reactants from which they were made. In a ____ reaction, both processes are happening at the same time. After a while, there will be a ____ between the two halves of the reaction. While some of the reactants will be making new ____, some of the product molecules will be breaking down to re-form the ____ molecules. At this stage the reaction is said to be in ____ – in other words, it’s balanced.

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