Question

Name the fundamental law that is involved in every equation

Answer 1

The Law of Conservation of Mass.

It states that during a reaction, matter cannot be created or destroyed. That is why all equations have equal atoms on the reactant's side and the product's side.

Answer 2

the fundamental law are:
1.law of conservation of mass
2.Avogadro's hypothesis
3.law of combining volume
4.laws of definite proportion
5.law of multiple proportion

and the fundamental law involved in every equation is law of conservation of mass