An X-ray photon with a wavelength of 0.942 nm strikes a surface. The emitted electron has a kinetic energy of 999 eV. What is the binding energy of the electron in kJ/mol? [Note that KE = 1/2mv^2 and 1 electron volt (eV) = 1.602×10^−19 J.] The unit is kJ/mol.
Added by James F.
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626 x 10^-34 J·s), c is the speed of light (3 x 10^8 m/s), and λ is the wavelength in meters. E = (6.626 x 10^-34 J·s * 3 x 10^8 m/s) / (0.942 x 10^-9 m) E = 2110.19 x 10^-19 J Show more…
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