The Law of Conservation of Mass tells us that in a chemical reaction, the total mass of the reactants (starting materials) equals the total mass of the products (substances formed), and by using balanced equations with coefficients, we can visually show how many atoms of each element are involved in the reaction, helping us to predict how much of each reactant is needed and how much product will be created.
the concept of the Law of Conservation of Mass, how to visually represent chemical reactions with balanced equations, the relationship between coefficients and the number of atoms involved in a reaction, and the ability to accurately predict the relative amounts of reactants and products formed in a chemical reaction based on a balanced equation one sentence for an 8th grader
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