\textbf{228.} If the percent yield of the hypothetical equilibrium reaction: $\text{A}(\text{g}) + \text{D}(\text{g}) \rightleftharpoons 2\text{E}(\text{g}) + \text{G}(\text{g})$, where one mole of each reactant is placed in a one-liter closed container, at the reaction temperature is 60 percent, the equilibrium constant of this reaction is how many $\text{mol.L}^{-1}$?
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(1) $1/35$ \quad\quad (2) $2/25$ \quad\quad (3) $3/6$ \quad\quad (4) $5/4$
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