What Mass of Ammonium Nitrate Must Be Added to 350

question 105

Multiple Choice

What mass of ammonium nitrate must be added to 350. mL of a 0.150 M solution of ammonia to give a buffer having a pH of 9.00
(K_b(NH₃) = 1.8 * 10^-5)

• A) 7.6 g
• B) 2.4 g
• C) 5.4 g
• D) 11 g
• E) 3.3 g

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Definitions:

Nematodes

A phylum of worm-like organisms known as roundworms, which can be found in various habitats and play diverse ecological roles.

Cnidarians

A phylum of aquatic invertebrate animals that includes corals, jellyfish, sea anemones, and hydras, characterized by their cnidocytes, stinging cells used for prey capture and defense.

Antennae

Sensory appendages found on the heads of insects and some other arthropods, used for sensing the environment.

Arthropods

A large group of invertebrate animals characterized by exoskeletons, segmented bodies, and jointed legs, including insects, arachnids, and crustaceans.