What is the [H3O+] of a solution with [OH-] = 6.3 × 10-4 M?

Question

A. 6.3 × 10-18 M
B. 10.80 M
C. 6.3 × 10-4 M
D. 1.6 × 10-11 M

DrBob222 can you help me with this question please?

Answer 1

[OH-] [H+]=1E-14
[H+]=1E-14 /6.3E-4= ?

answer D is the closest

Answer 2

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