chemistry vs law of mass action

chemistry and law of mass action both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemistry	Yes	No	No	No
law of mass action	Yes	No	No	No

chemistry (noun)	law of mass action (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	(chemistry) the law that states the following principle: the rate of a chemical reaction is directly proportional to the molecular concentrations of the reacting substances
the way two individuals relate to each other
the chemical composition and properties of a substance or object