## Formula Units

305421980
Posts: 101
Joined: Sat Sep 07, 2019 12:16 am

### Formula Units

What's the difference between finding number of atoms or finding number of formula units? I know how to find formula units using dimensional analysis but am confused on the concept of them.

Brian J Cheng 1I
Posts: 115
Joined: Thu Jul 11, 2019 12:15 am

### Re: Formula Units

A google search told me that "formula units" is equal to the number of molecules of that specific compound present. I would use the same method as finding the amount of atoms (1 mol == 6.022 x 10^23 atoms or formula units). Please correct me if I'm wrong, thanks!

Charysa Santos 4G
Posts: 107
Joined: Wed Sep 18, 2019 12:21 am

### Re: Formula Units

Formula units just refer to an ionic compound's empirical formula, right? In any case, you would just multiply by Avogadro's constant (6.022 × 10^23 mol-1) to find the formula units.

Megan Jung 3A
Posts: 50
Joined: Thu Jul 11, 2019 12:17 am

### Re: Formula Units

The procedure for finding the number of atoms and the number of formula units is the same. Both require use of avogadro's constant in order to convert the values. An atom refers to the single element in a equation while a formula unit refers to finding a unit of an ionic compound.

Rebecca Epner 4A
Posts: 53
Joined: Sat Aug 17, 2019 12:18 am

### Re: Formula Units

I believe in some cases formula units refers to the number of atoms while in other cases it refers to the number of molecules, just depending on what the specific question is asking