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2. At 450°C, ammonia gas will decompose according to the following equation: 2 NH3 (g) ...

2. At 450°C, ammonia gas will decompose according to the following equation: 2 NH3 (g)  N2 (g) + 3 H2 (g) Kc = 4.50 at 475˚C An unknown quantity of NH3 is placed in a reaction flask (with no N2 or H2) and is allowed to come to equilibrium at 475°C. The equilibrium concentration of H2 is then determined to be 0.252 M. Determine the initial concentration of NH3 placed in the flask

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