The atoms of a carbon dioxide molecule (C02) are arranged in a line, with the carbon in the center and the oxygens on either side at a distance of 0.116 nm. In the absence of vibrations, calculate the energy (in micro electronvolt) of the third rotational state (L=3) of CO2 for rotations about an axis through the center of mass of the molecule.
I'm using equation E=L(L+1)h_^2/(2mR^2) but I just can't seem to get the right answer.