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Problem- Use the equilibrium constants for reaction (a) and (b) at 200 degrees celcius to calculate the equilibrium constant for reaction (c) at that temperature.

a) N2 (g) + O2 <-----> 2NO (g) Kct = 2.3 x 10^-19

b) NO2 (g) <-----> NO (g) + 1/2 O2 (g) Kc2 = 5.8 x 10^-4

c) 2NO2 (g) <-----> N2 (g) + 2O2 (g) Kc3 = ?

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