Why is stoichiometry called stoichiometry?
The term STOICHIOMETRY comes from two Greek roots.
"Stoicheion" which means element.
"Metron" which means to measure.
The study of Stoichiometry in Chemistry is the quantitative analysis of reactions and products so a chemical reaction. Comparing the amounts of reactant required and the amount of product that can be produced using the mole as the common base of measurement.
Since all chemical reactions involve the elements (stoicheion) and the measure (metron) of those reactions is the outcomes. The process is called "Stoichiometry".
I hope this was helpful.