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PLEASE HURRY URGENT! I WILL UPVOTE! How many grams of solid ammonium bromide should be added to 0.500L of a 0.265M ammonia solution to prepare

PLEASE HURRY URGENT! I WILL UPVOTE!
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How many grams of solid ammonium bromide should be added to 0.500L of a 0.265M ammonia solution to prepare a buffer with a pH of 9.940 ? Mass = 9 A buffer solution contains 0.292M acetic acid and 0.400M sodium acetate. If 0.0366 moles of hydrochloric acid are added to 150. mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume change does not change upon adding hydrochloric acid) How many grams of solid ammonium bromide should be added to 0.500L of a 0.265M ammonia solution to prepare a buffer with a pH of 9.940 ? Mass = 9 A buffer solution contains 0.292M acetic acid and 0.400M sodium acetate. If 0.0366 moles of hydrochloric acid are added to 150. mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume change does not change upon adding hydrochloric acid)

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