Use the chemical equation to complete the activity. 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 G of S to start the reaction. In this reaction all of the copper and all of the sulfur react before running the experiment the scientists expected the products of the reaction will be a total of 15.9 grams of copper sulfide (Cu2S) in1 - 2 sentences explain the law that the scientists use to predict that the product of the reaction will be a total of 15.9 grams of copper sulfide.
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, but is conserved. Therefore, the total mass of the products of a reaction should be equal to the total mass of the reactants. This law is used by scientists to predict the expected mass of the product in a reaction.
The scientific law that the scientists used to predict that the product of the reaction will be a total of 15.9 grams of copper sulfide is the Law of Conservation of Mass. According to this law, the total mass of the reactants must be equal to the total mass of the products in a chemical reaction. Since all of the copper and sulfur react and no other substances are mentioned, the scientists can predict that the total mass of the product, copper sulfide, will be equal to the combined mass of the copper and sulfur initially used in the reaction. Therefore, they expect the product to weigh 15.9 grams.
The law that the scientists use to predict that the product of the reaction will be a total of 15.9 grams of copper sulfide is the Law of Conservation of Mass. According to this law, the total mass of the reactants in a chemical reaction is equal to the total mass of the products. This means that the mass of copper and sulfur that react should be equal to the mass of copper sulfide produced. In this case, the scientists calculated the total mass of copper and sulfur reactants (12.7 grams + 3.2 grams = 15.9 grams) to predict that the product of the reaction will also be 15.9 grams of copper sulfide.
