Balancing Equations. Again.?

Yeah... still confused.

__ Mg + O2 ---> __ MgO

An explanation would be nice.

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  • 9 years ago
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    Well you have two O's on the LHS, but only one O on the RHS. Your reaction as written is not balanced.

    If Mg ++ is true, then 2 Mg + O2 ---> 2MgO balances. As you can see both sides have two each of the two elements. And Mg ++ <> - - O; so the two excess valence electrons in O are shared with the two open slots (plus two) in Mg.

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  • 9 years ago

    2Mg + O2 --> 2MgO

    See, there are 2 oxygen's, but one on the right side. So you put a "2" in the blanc in front of the MgO to have 2 oxygen's. But now you have 2 magnesium's on the right side, so you put a "2" in front of the magnesium on the left side.

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  • Anonymous
    9 years ago

    2 Mg + O2 ---> 2MgO

    Left Side:

    Total # Mg atoms = 2

    Total # O atoms = 2

    Right Side:

    Total # Mg atoms = 2

    Total # O atoms = 2

    Voila! Right side = Left side, and everything is balanced!

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