Nitrosyl bromide, \rm NOBr, is formed in the reaction of nitric oxide, \rm NO, with bromine, \rm Br_2: \rm 2NO(g)+Br_2(g)\rightleftharpoons 2 NOBr(g) The reaction rapidly establishes equilibrium when the reactants are mixed. Part A At a certain temperature the concentration of \rm NO was 0.400 M and that of \rm Br_2 was 0.265\it M . At equilibrium the concentration of \rm NOBr was found to be 0.250 M. What is the value of K_c at this temperature?