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Magnesium metal can combust to yield magnesia or magnesium oxide according to the balanced equation for...

Magnesium metal can combust to yield magnesia or magnesium oxide according to the balanced equation for the reaction: 2Mg + O2 ----> 2 MgO.    Determine the mass of magnesia product (i.e. the theoretical yield) when 1.8 grams of magnesium combusts in the presence of an excess of oxygen. Please show process so I understand solving future stoich problems. THanks

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