Question

A beam of light emits a frequency of 4.62x1014Hz. What is the energy assocaited with one mole fo these photons, in kJ? ( answer should be written in decimal form to one decimal place)

Answer 1

                          

E = hν

E = (6.626 x 10^-34 J s) (4.62x10^{14 S-1})

E = 30.612 x 10^-20J

with one mole of these photons = 30.612 x 10^-20x 6.023 x 10²³

                                              = 184.37 x 10³ J

                                              = 184.37 KJ