#### Answer

First-order.

#### Work Step by Step

The plot of ln[C4H2] vs t has a linear regression with $r^2=0.985$, while 1/[C4H2] vs t has $r^2=0.956$, so the reaction is of first-order.

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Published by
Cengage Learning

ISBN 10:
1133949649

ISBN 13:
978-1-13394-964-0

First-order.

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