T/F, The most stable charge state for an isolated oxygen atom is -2. If false explain why.

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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that's what i got you can count the number of atoms

the answer is barium and copper bromide

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.