Explain what is the concentration of no

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Question- Nitrogen monoxide, NO, is formed in automobile exhaust by the reaction of N2 and O2 N2(g) + O2 <-> 2 NO.... The equilibrium constant Kc is 0.0025 at 2127 degree Celsius. If an equilibrium mixture at this temperature contains 0.023 mole N2 and 0.031 mole O2, what is the concentration of NO?

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