Question

which of these statements best describes the law of conservation of mass A) when a physical or a chemical change occurs, matter is not created or destroyed B) when a physical or a chemical change occurs, matter is created but not destroyed C) When a physical or a chemical change occurs, matter can be created and destroyed D) when a physical or a chemical change occurs, matter can be created but not destroyed

Answer 1

The correct statement about the law of conservation of mass is A) when a physical or a chemical change occurs, matter is not created or destroyed. This law is pivotal in chemistry, ensuring that the total mass in a closed system remains unchanged after any chemical or physical change.

Step-by-step explanation:

The statement that best describes the law of conservation of mass is: A) when a physical or a chemical change occurs, matter is not created or destroyed. This fundamental principle of chemistry asserts that the total mass of a closed system will remain constant, regardless of the processes occurring within it. When charcoal burns in oxygen, for instance, the mass of the resulting carbon dioxide, water vapor, and ash must equal the mass of the original charcoal and oxygen.

During any chemical reaction, atoms are rearranged to form new substances, but no atoms are either created or destroyed. The concept was introduced by Antoine Lavoisier, a French chemist, in 1789 and has since been a cornerstone in the field of chemistry. The law applies to both physical and chemical changes and enables chemists to predict the outcomes of reactions based on the masses of reactants and products.

Answer 2

The statement which best describes the law of conservation of mass is A) when a physical or a chemical change occurs, matter is not created or destroyed. The law states that matter cannot be created or destroyed by ordinary chemical or physical changes, which means that the mass of all the components of a chemical reaction can be measured before and after the change in order prove that the mass is constant. So, keep in mind that the mass of participating products is always the same as the mass of all the reactants.