For the gas phase decomposition of nitrogen dioxide at 383 °C 2 NO2—2 NO + O2
the average rate of disappearance of NO2 over the time period from t = 0 s to t = 12 s is found to be 1.3610-2 Ms 1.
The average rate of formation of O2 over the same time period is
Ms-1

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?