Aerobic degradation of benzoic acid by a mixed culture of microorganisms can be represented by the following reaction. C6H5COOH + a O2 + b NH3 æÆ c C5H7NO2 + d H2O + e CO2 (substrate) (bacteria) a. Determine a, b, c, d, and e if RQ = 0.9. b. Determine the yield coefficients, YX/S and YX/O2. c. Determine degree of reduction for the substrate and bacteria

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?