Calculate the percentage of pyridine (C5H5N) that forms pyridinium ion,C5H6N+,in a 0.72 M aqueous solution of pyridine (Kb = 1.7 10-9) .
A) 1.7 10-7 %
B) 3.5 10-3 %
C) 2.4 10-7 %
D) 6.7 10-3 %
E) 4.9 10-3 %
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