[* بيبو *]

What is the [OH-] ion in a 5.2 × 10-4 M HNO3 solution?

1.9 × 10-11 M
1.0 × 10-7 M
5.2 × 10-4 M
zero
1.0 × 10-4 M

اش هو الحل ؟