You give your pulse tracer experiment data to your colleague and ask them to

describe the reactor behaviour using the $N-$tanks$-$in$-$series model. Their

calculations are messy and either $2$ tanks or $20$ tanks best models the

reactor. Perform the necessary calculations to determine which number of

tanks is the best model for the reactor behaviour.

$($a$)$ The actual reactor conversion of the contaminant is

$\%$

$($b$)$ For $N=2$ tanks the predicted conversion of the contaminant is

$($c$)$ For $N=20$ tanks the predicted conversion of the contaminant is

$\%.$

$($d$)$ tanks$-$in$-$series is the best model for the behaviour of this reactor.