When a clean iron nail is placed in an aqueous solution of copper (II) sulfate, the nail becomes coated with a brownish-black material. (a). What is the material coating on the iron?(b) What are the oxidizing and reducing agents? (c) Can this reaction be made into a voltaic cell? (d) Write the balanced equation for the reaction. (e) Calculate E∘cell for the process.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

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.

i believe the answer is 5,000