A --->  B  (first order)                                 time (sec)      [A]                                      0         1.22                                      3         0.86                                      6         0.61                                      9         0.43                                     12         0.31                                     15         0.22                                     18         0.15           What is the half-life (in sec) for the reaction shown above? 1) 12 2) 3 3) 6 4) .7

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