Acertain reaction has the form aa → bb. at a particular temperature and [a]0 = 2.80 × 10-3 molar, data was collected of concentration versus time for this reaction. a plot of 1/[a]t versus time resulted in a straight line with a slope value of 3.60 × 10-2 m-1s-1. what is the concentration of a after 300 seconds? a.2.80 × 10-3 molar b.2.72 × 10-3 molar c.2.60 × 10-3 molar d.3.60 × 10-2 molar