One benefit of using ph instead of molar concentrations is that since molarity is a rate of “ moles per liter" , Molarity (M) is used to measure the concentration of hydrogen ions in a solution, which is used with pH applications. ... The H+ is the molarity number, which shows the concentration of hydrogen ions in the solution.
A substance that has no specific volume changes to a substance that has a specific volume.
2 is your answer hope you get it right
An not sure,, but maybe 24. don't take my word for it