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At 25oC, the equilibrium constant for the reaction 2 A(aq) ----> B(aq) + C(aq) is 1.80...

At 25oC, the equilibrium constant for the reaction 2 A(aq) ----> B(aq) + C(aq) is 1.80 . If the concentration of B(aq) is 0.307 M and the concentration of C(aq) is 0.521 M, what would be the minimal concentration of A(aq) (in mol/L) required to make the reaction spontaneous?

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