B Hydrazine, $N_2{H}_4$ is a liquid at room temperature and is primarily used as a foaming agent to prepare polymer foams. However, it can also be used as a fuel in rockets or fuel cells decomposing to form $N_2(g)$ and $H_2(g).$ Draw the Lewis structure for hydrazine and $N_2$ and put these three molecules in order of increasing $N-N$ bond length and strength: $N_{2}O,N_2,N_2{H}_4.$