15. Which relationship is present in a solution that has a pH of 7? A) [H+] + [OH-] = 7 B) [H+]> [OH-] C) [H+]<[OH-] D) [H+] = [OH-]​

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.

catya your not at all which answer i've seen you do this on another question!