During the reaction $2NOBr(g)$ $\longrightarrow$ $2NO(g)$ $+$ $Br_2(g)$ in a given time, nitric oxide appears with a rate $v_ {NO} = 1.6\cdot 10^{- 4}\frac{mol}{L\cdot s} $, What is the rate of formation of bromine?
$v_{Br_2}$ $=$ $0.80 \cdot 10^{-4} \frac{mol}{L\cdot s}$
