describe how light is produced using these terms Absorption, Emission, excited state, ground state, energy level, electron, and photon

0.09 moles of sodium sulfate in 12 ml of solution

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules