Manganese is a key component of extremely hard steel.The element occurs naturally in many oxides. A 542.3-g sampleof a manganese oxide has an Mn/O ratio of 1.00/1.42 and con-sists of braunite (Mn₂O₃) and manganosite (MnO).(a) What masses of braunite and manganosite are in the ore?(b) What is the ratio Mn₃/Mn₂in the ore?

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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".