Choose the set of coefficients that correctly balances the following equation: \( \mathrm{xCr}_{...

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Choose the set of coefficients that correctly balances the following equation:
\( \mathrm{xCr}_{2} \mathrm{O}_{7}^{2-}+\mathrm{yH}^{+}+\mathrm{ze}^{-} \rightarrow \mathrm{aCr}^{+3}+\mathrm{bH}_{2} \mathrm{O} \)
\( \mathrm{xCr}_{2} \mathrm{O}_{7}^{2-}+\mathrm{yH}^{+}+\mathrm{ze}^{-} \rightarrow \mathrm{aCr}^{+3}+\mathrm{bH}_{2} \mathrm{O} \)
\( \begin{array}{cccccc} & \boldsymbol{x} & \boldsymbol{y} & \boldsymbol{z} & \boldsymbol{a} & \boldsymbol{b} \\ \text { (1) } & 2 & 14 & 6 & 2 & 7 \\ (2) & 1 & 14 & 6 & 2 & 7 \\ (3) & 2 & 7 & 6 & 2 & 7 \\ (4) & 2 & 7 & 6 & 1 & 7\end{array} \)
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