contestada

Electrons are ejected from a surface with speeds ranging up to 1380 km/s when light with a wavelength of 173 nm is used. What is the work function of this surface? The speed of light is 2.99792 Ɨ 108 m/s and Planckā€™s constant is 6.62607 Ɨ 10āˆ’34 J Ā· s. Answer in units of eV.

Respuesta :

drpelezo

Answer:

Ī”E(work)= 692 Kj/mole eā» = 4.32 x 10Ā²ā“ eV/mole eā»

Explanation:

Ī”E = hc/Ī» = (6.63 x 10ā»Ā³ā“jĀ·s)(2.99792 x 10āøm/s)/(1.73 x 10ā»ā·m) = 1.15 x 10ā»Ā¹āøj/eā» x 6.023 x 10Ā²Ā³ eā»/mole = 691,999 j/mole eā» = 692 Kj/mole eā» x 6.24 x 10Ā²Ā¹ eV/KJ = 4.32 x 10Ā²ā“ eV/mole eā»

Otras preguntas