For the Reaction, H₂(g)+ I₂(g) 2HI(g), K_c = 54

For the reaction, H₂(g) + I₂(g) 2HI(g) , K_c = 54.9 at 699.0 K. A system, at equilibrium, contains 2.50 moles of HI(g) and 2.12 moles of I₂(g) in a 5.00 liter vessel. How many moles of H₂(g) should there be in the container? Hint: Be sure to find molarities of all reactants and products before finding the equilibrium amount of H₂.

A) 0.0537 moles
B) 0.380 moles
C) 0.0215 moles
D) 0.0107 moles
E) 2.12 moles