A. Empirical Formula of Magnesium Oxide 1. Mass of crucible plus magnesium 25.748 2. Mass of crucible 25.503 24.305 3. Mass of magnesium (calculate) 4. Mass of crucible plus magnesium oxide 25.910 5. Mass of reacted oxygen (calculate) 16.00 Calculation of empirical formula (See Example 2) Moles Mg: Moles O:

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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".