Formula Units??

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Sophie Roberts 1E
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Formula Units??

Postby Sophie Roberts 1E » Wed Oct 03, 2018 9:20 pm

I am still confused what formula units are... In fundamentals E. 25 it says determine the number of KNO3 formula units in 0.750 mol KNO3.. Is that the same as saying the number of molecules/atoms? Where I am guessing you would use the conversion of moles to avogadros number.

Esther Ahn 4I
Posts: 30
Joined: Fri Sep 28, 2018 12:29 am

Re: Formula Units??

Postby Esther Ahn 4I » Wed Oct 03, 2018 9:30 pm

You would use Avogadro’s number because 1 mol of an atom, molecule or formula unit contains 6.022 x 10^23 atoms! Hope this helps :)

Annalyn Diaz 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

Re: Formula Units??

Postby Annalyn Diaz 1J » Wed Oct 03, 2018 9:32 pm

From my understanding, I think you are correct in regards to finding the formula units. I believe you would have to find the amount of moles first, then multiply by Avogadro's number.

Duby3L
Posts: 72
Joined: Fri Sep 28, 2018 12:26 am

Re: Formula Units??

Postby Duby3L » Wed Oct 03, 2018 10:02 pm

Formula units is the same process as solving for molecules or atoms. For an element it is referred to as atoms, compound it is referred to as molecule, and for an ionic compound it is referred to as formula units.


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