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How many grams of dry NH4Cl need to be added to 1.50 L of a 0.600...

How many grams of dry NH4Cl need to be added to 1.50 L of a 0.600 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.96? Kb for ammonia is 1.8×10-5. Express your answer numerically in grams to three significant figures.

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