Which statement best represents the Law of Conservation of Mass? * 2 points Matter can disappear in a chemical reaction. The total mass of substances stays the same a chemical reaction. The mass of a substance increases during a physical change. Mass conservation only applies to gases.
The statement that best represents the Law of Conservation of Mass is: The total mass of substances stays the same in a chemical reaction.
u positive?
Yes, I am positive. The Law of Conservation of Mass states that mass cannot be created or destroyed in a chemical reaction. The total mass of the substances involved in a chemical reaction remains constant before and after the reaction.
The statement that best represents the Law of Conservation of Mass is: "The total mass of substances stays the same in a chemical reaction."
To understand why this is the correct choice, let's break down the other options:
1) "Matter can disappear in a chemical reaction": This statement contradicts the Law of Conservation of Mass. According to this law, matter cannot be created or destroyed in a chemical reaction, only rearranged. So, matter cannot simply disappear.
2) "The mass of a substance increases during a physical change": The Law of Conservation of Mass specifically applies to chemical reactions and not physical changes. In physical changes like changing states of matter (e.g., melting, boiling), the mass of a substance remains the same because no new substances are formed.
3) "Mass conservation only applies to gases": This statement is incorrect. The Law of Conservation of Mass applies to all substances, not just gases. It states that the total mass of the reactants must be equal to the total mass of the products in a chemical reaction.
Therefore, the only accurate statement that aligns with the Law of Conservation of Mass is that "The total mass of substances stays the same in a chemical reaction."