17. When analyzing the thermal decomposition of chloroethane C2H5Cl→C2H4 HCl at 746 K, the following data were obtained:
Time, min 0 1 2 3 4 8 16
C2H5Cl, M 0.100 0.0975 0.0951 0.0928 0.0905 0.0819 0.0670
Calculate:
a) initial reaction rate;
b) instantaneous speed after 3 minutes
c) average speed for 16 minutes.

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