Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction
2COF2(g)⇌CO2(g)+CF4(g), Kc=4.50
If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium?