What is chemistry an how do I learn

The branch of science that deals with the identification of the substances of which matter is composed

you can learn by reading about it or google it

Answer: Chemistry is a subject. You can learn it at a local school.

Explanation: Chemistry is a school subject or, the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.