code class$=$"asciimath"$>79\backslash$deg C $197C$ What is $K_p$ for the following reaction? $H_2(g)+C_2{N}_2(g)2HCN(g)1\mathrm{.}25{10}^{3}4\mathrm{.}00{10}^4-4\mathrm{.}00{10}^{-4}2\mathrm{.}50{10}^{3}2\mathrm{.}00{10}^{-4}$