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The equilibrium constant for the gas phase reaction: 2 S O 3 ( g ) ⟺ 2 S O 2 ( g ) + O 2 ( g ) is Keq = 3.6 x 10^-3 at 999 K. At equilibrium, ___________. a. appreciable amounts of products and reactants are present. b. reactants predominate. c. products predominate. d. only reactants are present. e. only products are present.