Question

Given the equilibrium constants for the following reactions:

4Cu(s) + O2(g)  <->   2Cu2O(s), K1

4CuO(s)  <->  2Cu2O(s) + O2(g), K2

What is K for the system below equivalent to?

2Cu(s) + O2(g)  <->  2CuO(s)

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