A Buffer Was Prepared by Adding 2

question 92

Multiple Choice

A buffer was prepared by adding 2.4 g of ammonium nitrate to 100.0 mL of 0.30 M ammonia (Kb = 1.8 × 10^-5) . To this solution was then added 10.0 mL of 0.30 M sodium hydroxide, which caused a pH change of ________.

• A) 3.0 pH units
• B) 0.30 pH units
• C) 0.90 pH units
• D) 0.09 pH units
• E) zero

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The average number of years an individual is expected to live, based on current mortality rates.

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The total expenses incurred in the manufacturing of a product, including labor, materials, and overhead costs.

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