What is the molarity of hno3 (nitric acid if 20.0 ml of the solution is needed to exactly neutralize 10.0 ml of a 1.67 m naoh solution?
a.3.34 m strike reset
b.1.67 m strike reset
c.0.835 m strike reset
d.0.334 m strike reset?

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a