What Is the [H₃O⁺] for a Solution at 25°C That

Multiple Choice

What is the [H₃O⁺] for a solution at 25°C that has pOH = 5.640?

A) 2.34 × 10 ⁻⁴ M
B) 2.29 × 10 ⁻⁶ M
C) 4.37 × 10 ⁻⁹ M
D) 4.27 × 10 ⁻¹¹ M
E) 8.360 M