Compare the structures of $H_2O$ and $H_2O_2$.

(N/A) $H_2O$ (Water): In the gas phase, $H_2O$ is a bent molecule with a bond angle of $104.5^{\circ}$ and an $O-H$ bond length of $95.7 \text{ pm}$. It is a highly polar molecule with $sp^3$ hybridization of the oxygen atom.
$H_2O_2$ (Hydrogen Peroxide): $H_2O_2$ has a non-planar 'open book' structure. In the gas phase, the dihedral angle is $111.5^{\circ}$, while in the solid phase, it is $90.2^{\circ}$. The $O-O$ bond length is $147.5 \text{ pm}$ and the $O-H$ bond length is $95.0 \text{ pm}$.