Manganese is made by heating its oxide with aluminium powder: 3MnO₂ + 4Al → 3Mn + 2Al₂O₃. Why does this work?

ChemistryMediumHigh School (9–10)GeneralMetals and Non-metals › Reactions and the Reactivity Series

Manganese is made by heating its oxide with aluminium powder: $3\text{MnO}_2 + 4\text{Al} \rightarrow 3\text{Mn} + 2\text{Al}_2\text{O}_3$ . Why does this work?

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