Calculate the pH of a 0.10 M solution of the weak base NH₃. K_b for NH₃=1.8 x 10^-5.

The correct formula for N₂O₄ sulfate is:

Which of the following represents the ground-state electron configuration of Mo?

The total number of valence electrons in NO₂^1-  is:

The oxidation number of carbon in HCO₃^-1 is:

Which of the following is a weak acid?

The noble-gas electron configuration for ₂₈Ni²⁺ is:

The molecular formula of a compound with a molar mass of 90.04 and with empirical formula CHO₂ is:        H = 1.008, C = 12.01, O =16

The reaction that will take place when a strong acid (H⁺) is added to a buffer solution of NH₃ / NH₄⁺ is:

How many mL of water must be added to 200 mL of 6.0 M NH₃ to dilute the solution to 1.5 M?