When \( \mathrm{Cr}(\mathrm{s})+\mathrm{OH}^{-}(\mathrm{aq}) \rightarrow \mathrm{Cr}(\mathrm{OH}...

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When \( \mathrm{Cr}(\mathrm{s})+\mathrm{OH}^{-}(\mathrm{aq}) \rightarrow \mathrm{Cr}(\mathrm{OH})_{4}^{-}(\mathrm{aq})+\mathrm{H}_{2}(\mathrm{~g}) \) (basic solution) is balanced, the sum of the coefficients of all the reactants and products is:
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