The Rydberg Equation and Ionization Energy
I'm not sure where to begin. I really need some help on this one. I have the Rydberg equation here but I have no idea how to use the answer from the equation and use it to find the second ionization energy.
If the Rydberg constant for He+ is 0.04389 nm-1, what is the second ionization energy of helium in kJ mol-1