You can have a solution of hydrogen peroxide that might say 10% that means that 10% per mass of the hydrogen peroxide solution is the hydrogen peroxide the rest is water.
concentration is the amount of mass in the solution eg 5gdm-3
hope that helps
He was working with electrons
I had this same question on one of are worksheets is D I can’t really explain it but the answer is D
Answer:
if its a neutral atom there should be 6 electrons because there are 6 protons
Explanation:
