Carbonyl fluoride, \rm 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, \rm CF_4 via the reaction \rm 2 COF_2(g) \rightleftharpoons CO_2(g) + CF_4(g),~~~~{\it K}_c=4.70 If only \rm COF_2 is present initially at a concentration of 2.00 M, what concentration of \rm COF_2 remains at equilibrium?