E = hc/wavelength
wavelength = 656E-9 m
E will be in J/photon.
Convert to kJ knowing 1 kJ = 1000 J.
There are 6.02E23 photons in a mole of phonts
Post your work if you get stuck.
Calculate the energy in kj/mol of photon in red light of wavelength 656nm
1 answer