For the Reaction System, H₂(g)+ X₂(g) 2HX(g), K_c =

For the reaction system, H₂(g) + X₂(g) 2HX(g) , K_c = 24.4 at 300 K. A system made up from these components that is at equilibrium contains 0.200 moles of X₂ and 0.600 moles of HX(g) in a 4.00 liter container. Calculate the number of moles of H₂(g) present at equilibrium. Hint: Be sure to find molarities of all reactants and products before finding the equilibrium amount of H₂.

A) 0.059 mol
B) 0.074 mol
C) 0.123 mol
D) 0.148 mol
E) 0.295 mol