What Is the Binding Energy of an Electron in a Photosensitive

Multiple Choice

What is the binding energy of an electron in a photosensitive metal (in kJ/mol) if the longest wavelength of light that can eject electrons from the metal is 299.0 nm?

A) 279 kJ/mol
B) 400 kJ/mol
C) 792 kJ/mol
D) 2.50 × 10¹⁹ kJ/mol
E) 4.00 × 10^-20 kJ/mol