Answer:
46.8% should be. correct, I'm not fully sure though. : )
A compound can be treated like an element when balancing chemical equations when : A. when there is no change to the atoms in the compound
If they remain together during the reaction, you can treat a compound as a singe atom.
hope this helps
Answer : E cell standard is the potential difference between the two electrodes under standard conditions. Overall tendency for the redox reaction to occur spontaneously. A large positive E cell means the reaction is more spontaneous, and a negative E cell indicates a non spontaneous reaction.
Explanation: hope this answers your question
(A) Iron
(B) Water-Oxygen
(C) Clean the surface, and/or remove the rust