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Given, N2 + 3H2 ⇌ 2NH3; K1. N2 + O2 ⇌ 2NO; K2. H2 + 1/2 O2 ⇌ H2O; K3. We have to calculate 4NH3 + 5O2 ⇌ 4NO + 6H2O; K = ?

1. K = [NO]^2[H2O]^3 / [NH3]^2[O2]^5/2
2. K1 = [NH3]^2 / [N2][H2]^3
3. K2 = [NO]^2 / [N2][O2]
4. K3 = [H2O]^3 / [H2][O2]^3/2

Correct answer: K = [NO]^2[H2O]^3 / [NH3]^2[O2]^5/2

Solution

The equilibrium constant for the given reaction can be derived by combining the equilibrium constants K1, K2, and K3 appropriately. The resulting expression matches option A.

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