Thursday
November 27, 2014

Homework Help: CHEM

Posted by K on Monday, November 5, 2007 at 10:14pm.

I just have a couple of questions that I need some help with:

1) A 0.22-caliber handgun fires a 27g bullet at a velocity of 765m/s.

Calculate the de Broglie wavelength of the bullet.

Express your answer using two significant figures in meters.

~and~

2) An X-ray photon of wavelength 0.970nm strikes a surface. The emitted electron has a kinetic energy of 956eV.

What is the binding energy of the electron in kJ/mol?
KE=1/2mv^2; 1 electron volt (eV)=1.602*10^-19J

Answer= BEmol = _______kJ/mol

please help if possible.

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