Carbonyl fluoride, COF$2$

$,$ is an important intermediate used in the production of fluorine$-$containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF$4$

via the reaction

$2$COF$2($g$)$CO$2($g$)+$CF$4($g$),$ Kc$=6\mathrm{.}10$

If only COF$2$

is present initially at a concentration of $2\mathrm{.}00$ M

$,$ what concentration of COF$2$

remains at equilibrium?

Express your answer with the appropriate units.