The coefficients given before substances in a balanced chemical equation. For example, the stoichiometric coefficient of carbon dioxide in the following reaction is 4:
2 C 2 H 6 (g) + 7 O 2 (g) 4 CO 2 + 6 H 2 O
STOICHIOMETRIC COEFFICIENT
Meaning of STOICHIOMETRIC COEFFICIENT in English
General chemistry English glossary. Английский глоссарий общей химии. 2012