2.Calculate the energy of one mole of photons with a wavelength of 269. nm. (in kJ/mol)

3.Calculate the wavelength of an electron moving at 2.56106 m/s

4.Calculate the wavelength of an elephant that weighs 2328 kg and is moving at 15.5 m/s.

5.What is the final orbital of an electron in a hydrogen atom if it emits 1.87103 nm of light? Assume that the electron began in the n=4 orbital.

6.What is the final orbital of an electron in a hydrogen atom if it absorbs 1.28103 nm of light? Assume that the electron began in the n=3 orbital.