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(g) The following data are collected.   times (s) 0 40 80 120 160   moles of A 0.100 0.070 0.044 0.035 0.021   (a) Calculate the number of moles of B at each time in the table. 0 s _____ 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

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