As a pilot is flying in level flight at 9,500 ft., the altimeter in the instrument panel is set to a pressure of 758 mm of Hg. As the aircraft travels along its route, the outside air temperature changes from 15.0°C
to 45.0°C. To what pressure does the pilot need to reset the altimeter in order for the altimeter to
indicate the aircraft's true altitude?
(3 sig figs)

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.

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.