# Bohr energy equation and Ionization energy

Hey, I was wondering if anyone could help me out with this. I need to take the Bohr energy equation ( En= -2.178 x 10^-18) (Z^2 /n^2) and the Inoization energy equation ( IE= Einfinity - Eground state). I need to somehow modify the bohr energy equation that can be used to find the inonization enery of hydrogen in kJ/mol.

I'm completly stuck so if anyone could give me some pointers on how to start this problem that would be awesome!!!

Thank you