chemistry

when 18.66 g of magnesium react with 22.28g of oxygen, 30.94g of megnesium oxdie forms. If all the magnesium reacts, how many grams of oxygen remain un-reacted?

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  1. 2Mg + O2 ==> 2MgO

    Convert 18.66 g Mg to mols.
    Convert mols Mg to mols oxygen (which is mols oxygen USED).
    Convert mols oxygen to grams and subtract initial mols - mols used = mols remaining.
    Post your work if you need more help.

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