Calculate the energy required to remove an electron completely from n = 2 orbit of hydrogen atom, What is the longest wavelength of light in cm that can be used to cause this transition?

The quantized energy of an electron in hydrogen atom for the n^(th) it level is given by E_n=(1.312)/n^2 xx 10^6 Jmol^(-1) , Calculate the energy required to remove the electron completely from an excited hydrogen atom when its quantized level, n=3 , (N_A=6.02 xx 10^(23) mol^(-1))

The kinetic and potential energy (in eV) of an electron present in 2^(nd) Bohr's orbit of hydrogen atom are respectively?

What is the energy in joules required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is -2.18xx10^(-11) ergs. (1erg=10^(-7)J)