Which of the following is the correct value of Kb for nitrite (NO2-) given that Ka for nitrous acid (HNO2) is 7.1 x 10-4?
A. 7.1 x 10-4
B. 1.4 x 103
C. 7.1 x 1010
D. 1.4 x 10-11
E. None of the above
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