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Jakob Littel

Feb 20, 2025

A lithium atom moving at 2.6×105 m/s

I am trying to find the wavelength for a lithium atom moving at 2.6×10^5 m/s.I know that the equation should basically be (wavelength = Planck’s Constant / mass X velocity. I keep getting 3.67 x 10^-34 but it seems wrong. I think I am converting lithium wrong. Can anyone help?
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Hermina Ferry

Feb 20, 2025

The atomic weight of Lithium is 6.9 g/mole. If we divide by 1000, to get to kg and then by Avogadro’s number, we get m=1.15*10^-25Then use the formula you quotedlambda=h/(mv)=>(6.6310^-34)/((1.1510^-25)2.610^5)=2.2*10^-14 metersHope that helps.... Show More
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Hermina Ferry

Feb 20, 2025

This Site Might Help You.RE:Wavelength of lithium atom, please help.?I am trying to find the wavelength for a lithium atom moving at 2.6×10^5 m/s.I know that the equation should basically be (wavelength = Planck’s Constant / mass X velocity. I keep getting 3.67 x 10^-34 but it seems wrong. I think I am converting lithium wrong. Can anyone help?... Show More
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