Ecording to the law of conservation of mass, if three atoms of oxygen
a reactant, how many atoms of oxygen must be part of the product?
a.1
b.4
c.2
d.3

Your question is not clear but if you can explain yourself i would be glad to .  just trying to : ))

Answeramino acids;

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.

Don’t know. don’t care.look it up on google