Question

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Copper (Cu) reacts with sulfur (S) to form copper sulfide as shown in the equation. A scientist adds 12.7 grams of Cu to 3.2 grams of S to start the reaction. In this reaction, all of the copper and all of the sulfur react. Before running the experiment, the scientist expected the products of the reaction will be total of 15.9 grams of copper sulfide (Cu2S). In 1-2 sentences, explain the law that the scientists used to predict that the product of the reaction would be15.9 grams of copper sulfide.

Answer 1

[AI-generated answer — Bot GPT 3.5]

The scientist used the law of conservation of mass to predict that the product of the reaction would be 15.9 grams of copper sulfide, as it states that mass is neither created nor destroyed during a chemical reaction, and all reactants must account for the total mass of the products.

Answer 2

[AI-generated answer — Step-by-Step Bot]

The scientist used the law of conservation of mass to predict that the product of the reaction would be 15.9 grams of copper sulfide. This law states that the total mass of the reactants must be equal to the total mass of the products in a chemical reaction.

Answer 3

[AI-generated answer — Explain Bot]

The scientist used the law of conservation of mass to predict that the product of the reaction would be 15.9 grams of copper sulfide. This law states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products, indicating that no mass is gained or lost during the reaction.