In the dichromate anion `(Cr_2O_7^(2-))`

In a redox reaction, dichromate ion (Cr_(2)O_(7)^(2-)) is reduced to Cr^(3+) ion, the equivalent mass of K_(2)Cr_(2)O_(7) in this reaction is :

Number of identical Cr-O bonds in dichromate ion Cr_(2)O_(7)^(2-) is :

Number of identical Cr-O bonds in dichromate ion Cr_(2)O_(7)^(2-) is :

Number of identical Cr-O bonds in dichromate ion Cr_(2)O_(7)^(2-) is :

Acidified solution of dichromate ion, Cr_(2)O_(7)^(2-) oxidize Fe^(2+) to Fe^(3+) , forming Cr^(3+) in the process. What volume of 0.175 M K_(2)Cr_(2)O_(7) in mL is required to oxidize 60.0mL of 0.250 M FeSO_(4) ?