What Is the [H₃O⁺] in a Solution That Consists of 0.15

Multiple Choice

What is the [H₃O⁺] in a solution that consists of 0.15 M C₂N₂H₈ (ethylene diamine) and 0.35 C₂N₂H₉Cl? K_b = 4.7 * 10¯⁴

A) 2.0 * 10¯³ M
B) 1.1 * 10¯³ M
C) 6.3 * 10¯⁹ M
D) 2.1 * 10¯¹⁰ M
E) 5.0 * 10¯¹¹ M