For the chemical reaction “Diatomic oxygen gas plus solid phosphorus produces diphosphorus pentoxide,” when writing the balanced chemical equation, the coefficient in front of the oxygen gas reactant is ___ . 5 2 1 10 4

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".