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    Stiochemistry practice problems! help

    Homework Statement Aluminum oxide is formed from the reaction of metallic aluminum with oxygen gas. How many moles of Aluminum are needed to form 3.4 moles of Aluminum oxide? Homework Equations first equation:Al + O2 --> Al2O3 i balanced it at 4Al + 3O2 --> 2Al2O3 The Attempt at a...