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Question

Given the equilibrium constants for the following reactions: 4Cu(s) + O2(g) ⇌ 2Cu2O(s), K1 2CuO(s) ⇌ Cu2O(s) + 1/2 O2(g), K2 What is the K for the system: 2Cu(s) + O2(g) ⇌ 2CuO(s) equivalent to?