.the branch of science concerned with the substances of which matter is composed

.the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.the chemical composition and properties of a substance or body. plural noun: chemistries “the patient’s blood chemistry was monitored regularly”
2.the complex emotional or psychological interaction between people. “their affair was triggered by intense sexual chemistry”
Requirements: clearly

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