(a) Consider the combustion of octane, given below: 2CnH1(g)+25O2(g)16CO2(9)+15H,O(9) If CaH10(9) is decreasing at the rate of 0.390mol/s, what are the rates of change of O2(9),CO(9), and H,0(g) ? O2(g)/t2CO2(g)/t=H2O(g)/s=mol/smol/smol/s (b) The decomposition reaction given below: 2NH(9)1N2(q)+3H2(g) is carried out in a closed reaction vessel. If the partial pressure of NH(9) is decreasing at the rate of a03 torrimin, what is the rate of change of the total premu vessel? Ptit/t=