PLZZZ HELP ASAP EVEN IF ONE 1 QUESTION IS ANSWERED

1)It takes 663.0 kJ of energy to remove 1 mole of electron from an atom on the surface of titanium metal. How much energy does it take to remove a single electron from an atom on the surface of solid titanium?

2) An excited hydrogen atom emits light with a wavelength of 656.7 nm to reach the energy level for which n=2 . In which principal quantum level did the electron begin?

3)An FM radio station broadcasts at 88.4 MHz. Calculate the wavelength of the corresponding radio waves.

4)A sample of an ideal gas at 27.1 atm and 10.5 L is allowed to expand against a constant external pressure of 2.70 atm at a constant temperature. Calculate the work in units of kJ for the gas expansion. (Hint: Boyle’s law applies.)

5)As a system increases in volume, it absorbs 50.0 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.502 atm. The final volume of the system is 58.9 L. What was the initial volume of the system if the internal energy of the system decreased by 107.3 J?