$[15\mathrm{.}20].$

Consider the reaction $N_2(g)+O_2(g)2NO(g),$ for which $K_c=0\mathrm{.}10$ at $2,000C.$ Starting with initial concentrations of $0\mathrm{.}040M$ of $N_2$ and $0\mathrm{.}040M$ of $O_2,$ determine the equilibrium concentration of $NO.$

A$)5\mathrm{.}4{10}^{-3}M$

B$)0\mathrm{.}0096M$

C$)0\mathrm{.}013M$

D$)0\mathrm{.}080M$

E$)0\mathrm{.}10M$