A mixture containing 0.0392 M A (g) and 0.0452 M B (g) is allowed to come to equilibrium at 300 K. The reaction: 3 A(g) + 2 B (g) ↔C (g) + D (g)  occurs. At equilibrium, [C] = 0.00128 M. What is the value of Kp ?

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