For the reaction of carbon with carbon dioxide to make carbon monoxide, one set of conditions produced a Kc = 1.2 × 10-1. At equilibrium at a certain temperature, the concentration of product was 0.60 M. What was the concentration of carbon dioxide at that temperature?                                                                  C(s) + CO2(g) ⇌ 2CO(g) A) 3.33 M   B) 0.36 M   C) 5.0 M   D) 3.0 M   E) 0.60 M

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