x=5

z=8

7-2 Bacterial cells have been represented by the chemical formula C5H7NO2. Compute the theoretical oxygen demand (ThOD) of 8Xmg/L of bacterial cells, assuming the following reactions apply: C5H7NO2+5O25CO2+2H2O+NH3 and then: NH3+2O2NO3+H++H2O Guidance: You need to consider the ThOD that results from applying the two equations in sequence. The equations are balanced but you need to compute all the oxygen from the combined equations. The ThOD computation should follow the procedure in Example 7-2. 7.3R Phenol is the common name for C6H5OH that is used for antiseptics, mediations, plastics and some paint thinners. Compute the theoretical oxygen demand (ThOD) of 3Z0mg/L of Phenol, assuming the following reactions apply: C6H5OH+aO2iCO2+jH2O where a,i, and j are the constant integers needed to balance the chemical reactions. Guidance: Compute the gram molecular weights of the equation components. Compute the appropriate integer values (a,i, and j) to balance the equation for each element. The ThOD computation should follow the procedure in Example 7-2