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0.894 moles of NH3 is enclosed in a 5-litre container and heated to 620 K. If value of the equilibrium constant for the reaction 2NH3N2+3H2 is 0.0395 at 629 K then concentration of NH3 at equilibrium will be

A. 0.037

B. 1.37

C. 0.140

D. 5.337

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