This is the law of mass conservation.
A scientific law is based on many repeated correct experiments.
a phenomenon of nature that has been proven to invariably
Antoine Lavoiser proposed the use of symbols and formulas in naming elements.
His experiments were based on quantitative data, not qualitative. Also, he was extremely accurate which was not the case for his predecessors. This allowed him to then develop the Law of Conservation of Mass.
Lavoiser
Antonie Lavoiser Joseph Priestly Antonie Lavoiser Joseph Priestly
Lavoisier conducted a number of experiments that were based on the assumption that matter can neither be created nor destroyed and validated it through the experiments. This led to the formulation of the Law of Conservation of Mass (or Matter).
The law of conservation of mass, also known as the law of conservation of mass-energy, is based on the experiments of Antoine Lavoisier. This law states that mass or matter cannot be created or destroyed in a chemical reaction, only changed from one form to another.
A biological law is a generalization that describes a consistent and predictable relationship in living organisms. It is a statement based on repeated observations and experiments that explain a fundamental aspect of biology, such as the inheritance of genetic traits through Mendel's laws.
Scientific laws are based on scientific experiments, scientific conclusions after exhaustive tests, and they are also based on formerly scientific discoveries and experiments. Scientific evidence without a conclusive proof may be a false evidence. Scientific evidence doesn't exist. Science is not based on evidences, but on real results originated from a theory. Results are solid, palpable, real and cannot be doubted.
Law
the father of physical chemistry is "antoine lavoiser"