Chapter 15, Problem 33E

Consider the reaction:

${\text{C}}_{\text{4}}{\text{H}}_{\text{8}}\left(\text{g}\right)\to {\text{2C}}_{\text{2}}{\text{H}}_{\text{4}}\left(\text{g}\right)$
The tabulated data were collected for the concentration of C₄H₈ as a function of time.

Time (s)	C4H8(M)
0	1.000
10	0.913
20	0.835
30	0.763
40	0.697
50	0.637

.

a. What is the average rate of the reaction between 0 and 10 s? Between 40 and 50 s?
b. What is the rate of formation of C₂H₄ between 20 and 30 s?