Balance the Redox Reaction: Br^-(aq)+ Cr₂O₇^2-(aq) $\to$ Cr³⁺ + Br₂ (L)
A)4 Br^- + Cr₂O₇^2- + 7

Balance the redox reaction: Br^-(aq) + Cr₂O₇^2-(aq) $\to$ Cr³⁺ + Br₂ (l)

A) 4 Br^- + Cr₂O₇^2- + 7 H⁺ → 2 Cr³⁺ + 2 Br₂ + 7 H₂O
B) 6 Br^- + Cr₂O₇^2- + 147 H⁺ → 2 Cr³⁺ + 3 Br₂ + 7 H₂O
C) 2 Br^-+ Cr₂O₇^2- + 147 H⁺ → 2 Cr³⁺ + Br₂ + 7 H₂O
D) 2 Br^- + 2 Cr₂O₇^2- + 147 H⁺ → 4 Cr³⁺+ Br₂ + 14 H₂O
E) none of the above