A mixture of nitrogen and hydrogen gases, at a temperature of 500K, was put into

Question

A mixture of nitrogen and hydrogen gases, at a temperature of 500K, was put into an evacuated vessel of volume 6.0 dm^3. The vessel was then sealed. N_2(g) + 3H_2(g) 2NH_3(g) The mixture was allowed to reach equilibrium. It was found that 7.2 mol of N_2 and 12.0 mol of H_2 were present in the equilibrium mixture. The value of the equilibrium constant, K_c, for this equilibrium is 6.0 times 10^-7 at 500 K. What is the concentration of ammonia present in the equilibrium mixture at 500 K? A 0.58 mol dm^-3 B 0.76 mol dm^-3 C 3.5 mol dm^-3 D 27 mol dm^-3

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