Calculate the Percentage of Pyridine (C₅H₅N)that Forms Pyridinium Ion,C₅H₆N⁺,in a 0.72

Multiple Choice

Calculate the percentage of pyridine (C₅H₅N) that forms pyridinium ion,C₅H₆N⁺,in a 0.72 M aqueous solution of pyridine (K_b = 1.7 $\times$ 10^-9) .

A) 1.7 $\times$ 10^-7 %
B) 3.5 $\times$ 10^-3 %
C) 2.4 $\times$ 10^-7 %
D) 6.7 $\times$ 10^-3 %
E) 4.9 $\times$ 10^-3 %