Consider the endothermic reaction $A(g)=B_g+C_{(g)}.$ The $K_c$ value is $0\mathrm{.}68$ and the initial concentrations of $B$ and $C$ are $0\mathrm{.}5M$ and $1\mathrm{.}0M,$ respectively at $25C.$ What is Kp value and the equilibrium molar concentration of B$?$