The blue curve is the plot of the data. The orange line is tangent to the blue curve at t = 40 s.

 

For the reaction A products time and concentration data were collected. t(s) [A] (M) 0 0.52 20 0.43 40 0.35 60 0.29 80 0.24 100 0.20 The blue curve is the plot of the data. The orange line is tangent to the blue curve at t = 40 s. [A] (M) 0.52 0.48 0.44 0.40 0.36 0.32 0.28 0.24 0.20 0.16 0 10 20 30 40 50 60 70 80 90 100 t(s) Approximate the instantaneous rate of this reaction at time t = 40 s. Number M/S