Nitrosyl bromide, NOBr, is formed in the reaction of nitric oxide, NO, with bromine, Br2
2NO(g) + Br2(g)⇌ 2NOBr(g)
The reaction rapidly establishes equilibrium when the reactants are mixed. At a certain temperature the initial concentration of NO was 0.400 M and that of Br2 was 0.265 M. At equilibrium the concentration of NOBr was found to be 0.250 M. What is the value of Kc at this temperature. Express your answer numerically.
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