The value of the equilibrium constant for the reaction: 2NH3N2(g) + 3H2(g) is 2.5 x 10-9 at 25°C. The value of the equilibrium constant for the reverse reaction at the same temperature is: 2.5 x 10-⁹ | 4.0 x 108 2.0 x 104 4.0 x 10⁹

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