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September 3, 2015

Homework Help: Chemistry

Posted by Chelsea on Monday, November 11, 2013 at 10:59pm.

If the wavelength if determined to be 0.018 nm, at what velocity is the electron traveling?
(The mass of an electron is 9.11x10^-31kg)

I know the answer is 4.0x10^7 m/s, but i cannot figure how they got this. Could someone please explain it to me and show me?
Thanks!!

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