For the reaction 2 CO2(g) <--> 2 CO(g) + O2(g) , K = 4.3 x 10-21 at a particular temperature. At equilibrium, which of t

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For the reaction 2 CO2(g) <--> 2CO(g) + O2(g) , K = 4.3 x10-21 at a particular temperature. At equilibrium,which of the following is true?
products are favored
neither products nor reactants are favored
for ALL reactions, product concentration must equal reactionconcentration at equilibrium
reactants are favored