For the redox reaction
`Cr_(2)O_(7)^(-2)+H^(+)+Ni rarr Cr^(3)+Ni^(2+)+H_(2)O`
The correct coefficents of the reactions for the balanced reaction are

For the redox reaction: Cr_(2)O_(7)^(2-)+H^(o+)+NirarrCr^(3+)+Ni^(2)+H_(2)O The correct coefficient of the reactants for the balanced reaction are:

For the redox reaction: Cr_(2)O_(7)^(2-)+H^(o+)+NirarrCr^(3+)+Ni^(2)+H_(2)O The correct coefficient of the reactants for the balanced reaction are:

For the red ox reaction : Cr_2O_(7)^(2-) +I^(-) +H^(+) rarr Cr^(3+) + I_2 + H_2O the correct coefficients of the reactants for the balanced equation are

For the redox reaction: Fe^(2+)+ Cr_2O_7^(2-) +H^+ rarrFe^(3+) + Cr^(3+) + H_2O The correct coefficients of the reactants for the balanced reaction are

For the redox reaction xFe^(2+)+yCr_(2)O_(7)^(2-)+zH^(+) rarr Fe^(3+)+Cr^(3+)+H_(2)O x , y and z are

For the redox reaction xFe^(2+)+yCr_(2)O_(7)^(2-)+zH^(+) rarr Fe^(3+)+Cr^(3+)+H_(2)O x , y and z are

For reaction : Cr_(2)O_(7)^(-2)+14H^(+)rarr2Cr^(+3)+7H_(2)O , How many e^(-)s are required