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A balanced equation is a chemical equation where the number of atoms of each element on both sides of the equation is equal. It follows the law of conservation of mass.
The study and calculation of quantities (masses or volumes) during chemical reactions based on balanced equations.
Numbers placed before chemical formulas to balance equations by adjusting the number of atoms or molecules involved.
States that matter cannot be created or destroyed in ordinary chemical reactions; therefore, mass must remain constant throughout any given reaction.