Answer:

Explanation:
Comparing to the solution consisting a pH of 5 containing
of hydrogen ions, a solution having a pH of 6 consists of
of hydrogen ions. A solution having a pH of 7 too will have a pH of
.
··hydrogen peroxide if its wrong sorry i didnt pay atention much but i do remember the elemants being hydrogen peroxide and oxygen and copper so ya ω
It would be in the fourth shell.
Answer :
B
!!!!!!!!!!!!!!!
8.4 grams. I think but I’m not 100% sure