What Is the [H₃O⁺] in a Solution That Consists of 1.5

Multiple Choice

What is the [H₃O⁺] in a solution that consists of 1.5 M NH₃ and 2.5 NH₄Cl? K_b = 1.8 × 10⁻⁵

A) 1.1 × 10 ⁻⁵ M
B) 3.0 × 10 ⁻⁶ M
C) 3.3 × 10 ⁻⁹ M
D) 9.3 × 10 ⁻¹⁰ M
E) None of these choices are correct.