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Calculate the mass of a mono hydroxy (one OH-) weak base that has to be dissolved...

Calculate the mass of a mono hydroxy (one OH-) weak base that has to be dissolved in enough water to make a 250. mL solution with a pH of 8.99.

Kb of the base is 3.80 x 10-10. ,molar mass of the base is 93.0 g/mol

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