What is the conversation of matter?

The conversation of matter, often referred to as the conservation of mass, is a fundamental principle in science stating that matter cannot be created or destroyed in a closed system during a chemical reaction. Instead, the total mass of the reactants equals the total mass of the products. This principle underpins various scientific fields, including chemistry and physics, and is essential for understanding chemical reactions and processes. It highlights the idea that atoms are rearranged, but their total number remains constant throughout the reaction.