What is conserved during a chemical reaction?

In a chemical reaction, the total mass of the reactants is always conserved. This principle is known as the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction, only rearranged.

In addition to mass, other properties such as energy, charge, and momentum are also conserved during a chemical reaction. This means that the total energy of the system remains constant before and after the reaction, as well as the total charge and total momentum.

The conservation of these properties allows scientists to predict the outcomes of chemical reactions and understand the underlying principles of chemistry. It also helps to ensure that experimental observations are accurate and reproducible.