12. For the hypothetical reactions 1 and 2, K1 = 102 and K2 = 10-4 .

1. A2(g) + B2(g)⇌ 2AB(g)

2. 2A2(g) + C2(g)⇌ 2A2C (g)

3. A2C (g) + B2(g)⇌ 2AB(g) + (1/2)C2(g)

What is the value for K for the reaction 3?
(A) 10-2
(B) 104
(C) 106
(D) 102
(E) 10-4

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