What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide? h+ + cl- + k+ + oh- → 2h+ + o2- + k+ + cl- h+ + cl- + k+ + oh- → h2o + k+ + cl- h+ + oh- → h2o none of the above 2h+ +2cl- + k2+ + 2oh- → h2o + k2+ +2 cl-?

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?