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    State the formulae for the following ions: NO3, CO32-, SO42- ​and NH4+
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    You've given the formulae in your question.

    Except it's NO3-
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    Do you mean state the name? Then it is: Nitrate, Carbonate, Sulphate, Ammonium respectively.

    Thanks, James.
 
 
 
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Updated: December 28, 2014
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