Indicate which of the numbers in the following equations are coefficients and which are subscripts
3h2so4 + 2al > al2 (so4)3 + 3h2

3h2so4 + 2al > al2 (so4)3 + 3h2
in  3h2so4 3 is the coefficient and 4 is the subscript
in 2al 2 is the coefficient
in  al2 (so4)3   2 4 and 3 are  the subscript
in 3h2 3 is the coefficient and 2 is the subscript.

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Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.