## DE BROGLIE [ENDORSED]

$\lambda=\frac{h}{p}$

Irma Ramos 2I
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am

### DE BROGLIE

How do we find the mass of atom given the molar mass of the element in order to use the de broglie equation??

Vivian Nguyen
Posts: 66
Joined: Fri Sep 29, 2017 7:04 am
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### Re: DE BROGLIE

Is there a specific problem you can refer too? From the molar mass you can calculate the mass of an atom using Avogadros number. So you would take (molar mass/ 1 mol)× (1 mol/ 6.022x10^23 atoms) which would give you the mass per atom of that element.

Simply divide the molar mass by 6.022x10^23

Jessica Jones 2B
Posts: 80
Joined: Fri Sep 29, 2017 7:04 am

### Re: DE BROGLIE

When using the de broglie for an electron we use the known mass 9.11^-31 kg.
Remember to always use SI units when solving, which are kg.

Chem_Mod
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### Re: DE BROGLIE  [ENDORSED]

You can also discuss this today (Thursday) in the many support hours I have organized:

Chemistry & Biochemistry, 4222 Young Hall
Victoria Ford 12-1 pm, Ronald Yang 12-1 pm, Karen Leung 1-2pm

STEM Learning Center, Boelter Science & Engineering Library 8251
Franklin Liu 2-4 pm

Five (physical) hours available today (Thursday), in addition to Chemistry Community.