Are the Law of Conservation of Mass and the Law of Conservation of Matter describing the same phenomenon or different ideas?

The Law of Conservation of Mass and the Law of Conservation of Matter describe the same phenomenon. Both laws state that the total mass or matter in a closed system remains constant and is neither created nor destroyed in a chemical reaction or a physical change. The conservation of mass is a concept specifically applicable to chemical reactions, whereas the conservation of matter is a more general principle that encompasses both chemical and physical processes. Therefore, while the terminology may differ, the underlying concept remains the same.