Calcium and magnesium carbonates occur together in the mineral dolomite. Suppose you heat a sample of the mineral to obtain the oxides, CaO and MgO, and then treat the oxide sample with hydrochloric acid. If 7.556 g of the oxide sample requires 125 mL of 2.44 M HCl, CaO (s) + 2 HCl(aq) → CaCl₂ (aq) + H₂O(l) MgO(s) + 2 HCl(aq) → MgCl₂ (aq) + H₂O(l) what is the weight percent of each oxide (CaO and MgO) in the sample? % CaO % MgO

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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".