Methylamine (CH₃NH₂) Is a Weakly Basic Compound

Multiple Choice

Methylamine (CH₃NH₂) is a weakly basic compound. Calculate the K_b for methylamine if a 0.253 M solution is 4.07% ionized.

A) 2.29  10³
B) 4.37  10^4
C) 5.72
D) 4.24  10^2
E) 4.19  10^4