Answer:
e. copper ions, nitrate ions, and water.
Explanation:
a and b are eliminated because copper and nitrate turn out to be aqueous due to solubility rules.
that leaves you with b, c, and e.
with these types of problems, you'll never end up with electrons as the answer, it'll only ask you what the products are, and in the reactants, 'electrons' wasn't part of a compound.
lastly, you are with c and e.
this is pretty obvious as well, because H2O will stay H2O when you dissociate it, so you won't have copper hydronitrite. (Plus, that would require taking out oxygen and changing nitrate to nitrite, which doesn't follow the law of conservation of mass.
