2Cu+S→Cu2S 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 a total of 15.9 grams of copper sulfide (Cu2S). In 1–2 sentences, explain the law that the scientist used to predict that the product of the reaction would be 15.9 grams of copper sulfide.
The scientist used the Law of Conservation of Mass, which states that mass is neither created nor destroyed in a chemical reaction, to predict that the total mass of the reactants will be equal to the total mass of the products.
oh yeah i just realized the total mass is the result of adding them nevermind
Yes, exactly! The law of conservation of mass states that the total mass of the reactants must be equal to the total mass of the products. By adding the masses of the copper and sulfur together, the scientist predicted that the resulting copper sulfide would have a total mass of 15.9 grams.
The scientist used the law of conservation of mass to predict that the total mass of the reactants (copper and sulfur) would be equal to the total mass of the product (copper sulfide).
The scientist used the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction. Therefore, the total mass of the reactants must be equal to the total mass of the products.
