A flash is charyed with of 100 mol of A and allewed to react to form B according to the following hypothetical gas.phase reaction. The following data are collected. A(g)I(g) (a) Calculate the number of moles of 8 at each time in the table. (b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s. 0+40 40+80= 00.120: 120160mal/smol/s