At $600K$ the reversible gas reaction has rate constants of $k_1=2\mathrm{.}22f\frac{t^3}{l}$bmol$*s$ and $k_2=0\mathrm{.}032h^{-1}.$

A plug flow reactor is fed with $333\mathrm{.}33f\frac{t^3}{m}in$ of gas whose composition is $60\%$ bromine, $30\%$

$C_2{H}_4$ and $10\%$ inerts, at $600K$ and $1\mathrm{.}5$ atm. Determine:

a$)$ The composition in equilibrium.

b$)$ The number of tubes that make up the reactor, if each tube is $1in.$ in diameter and $20$

ft$.$ long, if $60\%$ conversion is achieved within the reactor.