Write a balanced half-reaction describing the reduction of gaseous dioxygen to aqueous oxide anions.

The balanced half reaction is written below.

Explanation:

Reduction reaction is defined as the chemical reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

When oxygen gas is reduced to oxide ions, the number of electron transferred are 2

The chemical equation for the reduction of oxygen gas to oxide ions follows:

Hence, the balanced half reaction is written above.

dynamic equilibrium is the answer.

its first and third is your answer i did the qustion the fourth isnt right