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The equilibrium constant for the reaction $$2A + 2B \rightleftharpoons 2C + 2D$$ is 100. The equilibrium constant for the $$A + B \rightleftharpoons C + D$$ at same temperature is _________.
Correct Answer: 10
Halving all the coefficients of a reaction gives the square root of its equilibrium constant. So $$K = \sqrt{100} = 10$$.
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