The Kb of ammonia is 1.76 ⋅ 10-5. The pH of a buffer prepared by combining 50.0 mL of 1.00 M ammonia and 40.0 mL of 1.00 M ammonium nitrate is .

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

What is the lowest number energy level where a d sublevel is found