You perform a reaction in which 60.0 g of calcium (ca) is reacted with carbonic acid (h2co3) to
form 150.2 g of calcium carbonate (caco) and some hydrogen gas (h2). if you only want to
produce 45.0 g of calcium carbonate, how much calcium will you need?

Because you ate playdough

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.

The answer is d) light rays pass through mirrors at an angle.