[OH] = 1.5 x 10^-13 , what is the [H3O] ?

Question

This is what I did.

1.0 x 10^-14 M / 1.5 x 10^-13 M = 1/15 or.066666

So what is the correct answer?

Thank You

Answer 1

You have the correct answer EXCEPT you must round to the correct number of significant figures (which is 0.067 M)