What is the charge on the complex \( \left[\mathrm{Cr}\left(\mathrm...

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What is the charge on the complex \( \left[\mathrm{Cr}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{2}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right] \) formed by \( \mathrm{Cr} \) (III)?
(1) \( +3 \)
(2) \( +1 \)
(3) \( +2 \)
(4) \( -1 \)
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