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Please I want to see the quadratic equation in this exercise I can't have the 0.0025....

Please I want to see the quadratic equation in this exercise I can't have the 0.0025.

•Phosgene is a potent chemical warfare agent that is now outlawed by international agreement. It decomposes by the reaction

COCl2(g) ↔ CO(g) + Cl2(g); Kc = 8.3x10–4 at 360°C

Calculate [CO], [Cl2], and [COCl2] when the following amounts of phosgene decompose and reach equilibrium in a 10.0-L flask.

(a) 5.00 mol COCl2           (b)   0.100 mol COCl2

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