average wavelength


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Monica Soliman 3F
Posts: 109
Joined: Wed Sep 30, 2020 9:57 pm

average wavelength

Postby Monica Soliman 3F » Sun Nov 01, 2020 8:10 pm

I m not sure how to do this. Can someone explain?
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Isis_DW_3G
Posts: 124
Joined: Wed Sep 30, 2020 10:04 pm

Re: average wavelength

Postby Isis_DW_3G » Sun Nov 01, 2020 8:13 pm

Hey Monica!
So for that one you'd have to use DeBroglie's wavelength. (Wavelength=planck's constant/mass x velocity)
You're already given the velocity so now you'd just find the mass of a Chlorine atom. In this case, since they said it's a diatomic molecule so you'd multiple 2(the molar mass of chlorine) and then multiply that by the mass of a neutron. then plug that value in as your mass and solve the rest for wavelength

hope this helps!

Astha Patel 2J
Posts: 111
Joined: Wed Sep 30, 2020 10:03 pm
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Re: average wavelength

Postby Astha Patel 2J » Sun Nov 01, 2020 8:14 pm

Use deBroglie's wavelength equation where wavelength = h/p, and p is momentum. p=mv. The problem gives you the velocity of the particle so all you have to do is plug it into the equation.

Eve Gross-Sable 1B
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Joined: Wed Sep 30, 2020 10:02 pm
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Re: average wavelength

Postby Eve Gross-Sable 1B » Sun Nov 01, 2020 9:27 pm

Isis_DW_3C wrote:Hey Monica!
So for that one you'd have to use DeBroglie's wavelength. (Wavelength=planck's constant/mass x velocity)
You're already given the velocity so now you'd just find the mass of a Chlorine atom. In this case, since they said it's a diatomic molecule so you'd multiple 2(the molar mass of chlorine) and then multiply that by the mass of a neutron. then plug that value in as your mass and solve the rest for wavelength

hope this helps!


Why do you multiply the molar mass of chlorine by the mass of a neutron?


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