One of the spectral lines in the emission spectrum of mercury has a wavelength of
6.234 x 10–7 m. How much energy is emitted if 1.00 mole of mercury atoms emits light of 6.234 x 10–7 m? Express your answer in kJ/mol.

I have no idea how to even begin this.. please help!

Question

One of the spectral lines in the emission spectrum of mercury has a wavelength of
	6.234 x 10–7 m. How much energy is emitted if 1.00 mole of mercury atoms emits light 	of 6.234 x 10–7 m? Express your answer in kJ/mol.

I have no idea how to even begin this.. please help!

aaronq · Answer

the energy of one photon is given by (planck's equation):

$$E=\frac{ hc }{ \lambda } $$

multiply what you get by avogadros number (because one mole)