Find the ph and the poh of the solution
1. 0.023 m solution of perchloric acid
2. 6.6 x 10^-6 m solution of nitric acid
3. 0.0334 m solution of potassium hydroxide

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?