The Law of Conservation of Mass states that matter cannot be created nor destroyed. It can only be transformed from one state or substance to another. This means that this law applies to both physical and chemical changes. In physical changes, the substance before and after the phase change still has the same mass. In chemical changes, the mass of reactants will always have the same mass of products and by-products.
I am sorry i wish i could help you but i dont know the answer either.
Answer:
Gill's
Explanation:
Fish's have many characteristics that differ from humans, and one of them is the gills.
It alwase equals the same amount of mass after the reaction