If the initial concentration of NOBr

is $0\mathrm{.}0440$ M

$,$ the concentration of NOBr

after $12\mathrm{.}0$ seconds is $\_\_\_\_\_\_\_\_.$

$0\mathrm{.}0334$ M

$0\mathrm{.}0309$ M

$0\mathrm{.}0403$ M

$0\mathrm{.}0342$ M

$0\mathrm{.}0276$ MPart A

The reaction

$2$NOBr$(g)2NO(g)+B{r}_2(g)$

is a second$-$order reaction with a rate constant of $0\mathrm{.}80$

$M^{-1}{s}^{-1}$ at $11C.$

If the initial concentration of NOBr is $0\mathrm{.}0440M,$ the concentration of NOBr after $12\mathrm{.}0$ seconds is

$0\mathrm{.}0334M$

$0\mathrm{.}0309M$

$0\mathrm{.}0403M$

$0\mathrm{.}0342M$

$0\mathrm{.}0276M$