Empirical formula

Write the empirical formula for at least four ionic compounds that could be formed from the following ions:_x000D_

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_x000D_

_x000D_

Fe+3_x000D_
_x000D_
_x000D_
,_x000D_

_x000D_

_x000D_

NH+4_x000D_
_x000D_
_x000D_
,_x000D_

_x000D_

_x000D_

ClO−3_x000D_
_x000D_
_x000D_
,_x000D_

_x000D_

_x000D_

CH3CO−2_x000D_
_x000D_

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