1. The decay of NO2 is described by the data:
Time, s 0 20 40 60 80 100
[NO2]*103, mol/l 17.8 10.6 7.1 5.4 4.6 4.0
Determine: a) the initial reaction rate; b) the reaction rate at 40 s; c) the average reaction rate in the time interval from 0 to 40 s.

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