The scientist applied the Law of Conservation of Mass to estimate that the reaction would produce 15.9 grams of copper sulfide. This law states that in a chemical reaction, matter cannot be created or destroyed. Therefore, the total mass of the reactants must equal the total mass of the products formed in the reaction.
rewrite The scientist used the Law of Conservation of Mass to guess that the reaction would create 15.9 grams of copper sulfide. This law means that in a chemical reaction, stuff can't just disappear or show up out of nowhere. So, the total weight of the things that go into the reaction (called reactants) has to equal the total weight of what comes out (called products).
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rewrite
The scientist utilized the Law of Conservation of Mass to predict that the reaction would yield 15.9 grams of copper sulfide. This principle indicates that matter cannot be created or annihilated in a chemical reaction. As a result, the combined mass of the reactants must be equal to the combined mass of the resulting products.