?

General Chemistry

Free Version

Upgrade subject to access all content

Difficult

Wavelength and the Photoelectric Effect

CHEM-ECHCC1

It takes 482 kJ/mol of energy to begin to eject electrons from a cobalt metal surface through the photoelectric effect.

What is the longest wavelength of light (in nanometers) that can be used to eject an electron from an atom on a cobalt surface?

$h=6.626\times { 10 }^{ -34 }\text{ } J\cdot s\\\ c=3.00\times { 10 }^{ 8 }\text{ } \cfrac { m }{ s } \\\ { N }_{ A }=6.022\times { 10 }^{ 23 }\cfrac { 1 }{ mole } $