You didn't write the choices??
34.9 cL = 0.00349 hL is the answer!
Answer:
The relationship of pH and concentration of H+ ion is pH = -lg[H+]. So the concentration of H+ is 10^(-2). And [OH-][H+]=10^(-14). pOH + pH = 14. So the right answer is A.
It’s C. 0.31 atm
I hope this helped out! Have a nice day :)