What is the [OH-] in a solution that has a [H3O+] = 2.0 × 10-4 M?
A) 2.0 × 10-10 M
B) 5.0 × 10-10 M
C) 1.0 × 10-10 M
D) 2.0 × 10-4 M
E) 5.0 × 10-11 M
Correct Answer:
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