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# How many grams (to the nearest 0.01 g) of NH4Cl (Mm = 53.49 g/mol) must be...

How many grams (to the nearest 0.01 g) of NH4Cl (Mm = 53.49 g/mol) must be added to 750. mL of 1.188-M solution of NH3 in order to prepare a pH = 9.90 buffer?

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