2 mol of `N_(2)` is mixed with 6 mol of `H_(2)` in a closed vessel of 1L capacity. If `50%` of `N_(2)` is converted into `NH_(3)` at equilibrium, the value of `K_(C )` for the reaction
`N_(2)(g0+3H_(2)(g)hArr 2NH_(3)(g)` is