Posted by Anon on Wednesday, September 18, 2013 at 7:19pm.
Calculate the wavelength of a proton with energy 2.45 eV.
Please some help!

Chemistry  DrBob222, Wednesday, September 18, 2013 at 9:09pm
2.45 eV = 3.92E19 joules.
Then E = hc/wavelength.
E = joules
h = Planck's constant
solve for wavelength in meters.

Chemistry  Anon, Thursday, September 19, 2013 at 8:51am
Can you write the result because i found 5.067e7 and it's wrong.I try it many time in diffrent ways baut I finished with the some result!

Chemistry  Anon, Thursday, September 19, 2013 at 2:11pm
Finally I found it.We have to do this :
wavelength=h/P
P^2=2*m*E
P=sqrt(2*m*E)
E = joule
h = Planck's constant
m = kg
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