Formula Units

Moderators: Chem_Mod, Chem_Admin

Fatemah Yacoub 1F
Posts: 114
Joined: Thu Jul 11, 2019 12:16 am

Formula Units

Postby Fatemah Yacoub 1F » Tue Oct 01, 2019 9:17 pm

I was wondering how to figure out the formula units for a problem? Does it always include using Avagadros Number? Will there ever be an instance where the conversion will not be 1 mole/ 6.02x10^23 formula units?

Siddiq 1E
Posts: 106
Joined: Fri Aug 09, 2019 12:15 am

Re: Formula Units

Postby Siddiq 1E » Tue Oct 01, 2019 9:37 pm

I had a similar question. I believe that in problems involving formula unit conversions you always use Avagadro's number, but I also was struggling to conceptually understand formula units.

Qiu Ya Wu 4I
Posts: 107
Joined: Fri Sep 20, 2019 12:17 am

Re: Formula Units

Postby Qiu Ya Wu 4I » Tue Oct 01, 2019 9:41 pm

I believe Avogadro's number can be applied to the amount of atoms, compunds, and formula units in a mole alike. To my knowledge, there has never been a scenario where the conversion between moles and formula units did not utilize Avogadro's number in some manner.

AChoudhry_1L
Posts: 55
Joined: Sat Sep 07, 2019 12:17 am

Re: Formula Units

Postby AChoudhry_1L » Tue Oct 01, 2019 9:47 pm

I was wondering the same thing, but as I was doing practice problems I noticed that you need to use Avogadro's number when you want your answer to be in atoms. This is useful when your units are moles, but you want it to be a certain amount of atoms or molecules.

Abigail Menchaca_1H
Posts: 104
Joined: Sat Sep 07, 2019 12:19 am

Re: Formula Units

Postby Abigail Menchaca_1H » Tue Oct 01, 2019 10:28 pm

Avogadro's number doesn't really have an assigned unit except for the fact moles can go into it. I think it's useful when you have a value already in moles and you want to convert it to something like atoms or formula units.

Lauren Tanaka 1A
Posts: 109
Joined: Sat Aug 17, 2019 12:18 am

Re: Formula Units

Postby Lauren Tanaka 1A » Wed Oct 02, 2019 6:14 pm

Formula units are the smallest units of an ionic compound. You usually find the formula units of an ionic compound from how many moles there are. Once you are in moles you are then able to convert into formula units using Avogadro's Number. I think for the most part Avogadro's Number will be l mole / 6.022 x 10^23 formula units since that's how many formula units are in 1 mole.

Cindy Adiwidjaja 1B
Posts: 100
Joined: Sat Jul 20, 2019 12:15 am

Re: Formula Units

Postby Cindy Adiwidjaja 1B » Wed Oct 02, 2019 11:23 pm

What is a formula unit in terms of physical things? Is it just a general name for a general unit? Or does it represent something tangible? I know what an atom, molecule, and ion is, however I do not think I can conceptually wrap my head around what an actual formula unit is or what quantity it exactly measures.


Return to “Accuracy, Precision, Mole, Other Definitions”

Who is online

Users browsing this forum: No registered users and 1 guest