A flask is charged with 0.100 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction. A(g) B(9) The following data are collected. times (s) 0 40 80 120 160 moles of A 0.100 0.069 0.043 0.032 0.025 (a) Calculate the number of moles of B at each time in the table. Os mol 40 s mol 80 s mol 120 s mol 160 s mol (b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s. 0 - 40 s mol/s 40 - 80 s mol/s 80 - 120 s mol/s 120 - 160 mol/s mol/s