Question: need help with both The [OH-] in a solution is 6.388E-7. What is the pH of this solution? Answer: Calculate the pH of a 3.8

need help with both The [OH-] in a solution is 6.388E-7.
need help with both

The [OH-] in a solution is 6.388E-7. What is the pH of this solution? Answer: Calculate the pH of a 3.8 x 10-12 M solution of HNO3

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