The rate law for the reaction at some temperature is Using the value for k calculated in Part a of this problem, how much time is required for the concentration of NOBr to decrease from 1.0 M to 0.1 M

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?