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A) solution of B-, a weak base , has a pH of 10.90.What is the molarity...

A) solution of B-, a weak base , has a pH of 10.90.What is the molarity of B- if kb=3.24 x 10^-5?

2) 0.500 mol of A2 and 0.500 mol of B2 are placed in sealed container : the reaction is A2(g)+B2(g)---2AB at equilibrium , the flask contains 0.6400 mol of AB.What is the Kc at this temperature?

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