## General Chemistry (4th Edition)

E = hc/ λ = (6.626 x 10$^{-34}$) (3 x 10$^{8}$) / 154 x 10$^{-10}$ = 0.129 x 10$^{-16}$ Energy of X-Ray Photon = 6.022 x 10$^{23}$ x 0.129 x 10$^{-16}$ = 7.77 x 10$^{8}$ J