The image is a model of sulfuric acid that has a chemical formula of H2SO4. In 1-2 sentences, explain why creating models, like the one shown in the image above, is important in understanding substances.
(2 points)
Creating models helps to visualize and understand the structure and properties of substances, which can aid in predicting their behavior and interactions with other substances.
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 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.
(2 points)
The scientist used the law of conservation of mass, which states that the total mass of the reactants must be equal to the total mass of the products in a chemical reaction.
In 3–5 sentences, describe what happens during a chemical reaction, using the terms reactant, product, and bond. (4 points)
During a chemical reaction, the reactants participate in a process that results in a rearrangement of atoms to form new products. Reactants are the starting materials that undergo a transformation during the reaction, while products are the substances that result from this transformation. Bonds between atoms in the reactants are broken, and new bonds form between the atoms of different reactants, resulting in the formation of new products. This rearrangement of atoms allows for the transfer of energy and the creation of new chemical bonds.
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 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.
(2 points)