A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) ¬B(g). The following data are obtained for [A] as the reaction proceeds. The average rate of disappearance of A between 10 s and 20 s is __________ mol/s. (show solutions) a. 1.1 x 10-3 b. 4.4 x 10-3 c. 454 d. 9.90 x 10-3 e. 2.2 x 10-3

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