How many grams of dry NH4Cl need to be added to 2. 00 L of a 0. 100 mol Lâ’1 solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8. 56? Kb for ammonia is 1. 8Ă—10â’5.

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123