Unit for Avogadro's Number

Moderators: Chem_Mod, Chem_Admin

Aprice_1J
Posts: 55
Joined: Wed Sep 18, 2019 12:16 am

Unit for Avogadro's Number

Postby Aprice_1J » Thu Oct 10, 2019 9:56 pm

I know that when you use Avogadro's number you are converting from moles but what unit are you converting to? A TA had told me that is depends on the context of the question but I am still unsure. Does anybody have any good examples/ways to interpret it? I am specifically struggling with whether or not to put it as molecules or atoms.

Deepika Reddy 1A
Posts: 125
Joined: Thu Jul 11, 2019 12:15 am

Re: Unit for Avogadro's Number

Postby Deepika Reddy 1A » Thu Oct 10, 2019 10:02 pm

It depends on what the question is asking for. For example, if it asks for the number of atoms in one mole of the substance, then avogadro's number would mean that there are 6.022 * 10^23 atoms of that element in that substance. Or if the questions asks how many formula units or molecules there are in a mole of that substance, there would be 6.022 * 10^23 formula units or molecules in the substance. If the questions is asking you to find the molecules, they you say molecules per mole, but if it asking you to find the atoms, then you say atoms per mole as the units for avogadro's number.

Eugene Chung 3F
Posts: 142
Joined: Wed Nov 15, 2017 3:03 am

Re: Unit for Avogadro's Number

Postby Eugene Chung 3F » Thu Oct 10, 2019 10:13 pm

if the question asks how many atoms, then it would be atoms. If the question asks how many molecules/ formula units, then it's molecules/formula unit. It can also be used for protons, etc.

Nicholas_Gladkov_2J
Posts: 125
Joined: Sat Aug 17, 2019 12:17 am

Re: Unit for Avogadro's Number

Postby Nicholas_Gladkov_2J » Thu Oct 10, 2019 10:51 pm

Aprice_1J wrote:I know that when you use Avogadro's number you are converting from moles but what unit are you converting to? A TA had told me that is depends on the context of the question but I am still unsure. Does anybody have any good examples/ways to interpret it? I am specifically struggling with whether or not to put it as molecules or atoms.


Avogadro's Constant is used to convert the number of moles of "something" to the number of atoms or molecules or formula units of that "something". Sometimes, it can confusing if they say "moles of an atom." If they say that it means the number of moles, not the number of atoms. Always look for what they are asking. If they say the number of molecules in x number of moles of that molecule, then use Avogadro's constant.

Jared_Yuge
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Re: Unit for Avogadro's Number

Postby Jared_Yuge » Sun Oct 13, 2019 10:16 pm

Just look at what they are using in the question, cause if you understand what it represents then you can just use dimensional analysis and be done with that step, you shouldn't need to guess

Kaitlynn Tran 3F
Posts: 54
Joined: Wed Sep 18, 2019 12:20 am

Re: Unit for Avogadro's Number

Postby Kaitlynn Tran 3F » Sun Oct 13, 2019 10:37 pm

After using Avogadro's number for conversion, your answer will be in atoms, molecules, or formula units depending on the context of the question.

Timmy Nguyen Dis 1I
Posts: 107
Joined: Sat Aug 17, 2019 12:17 am

Re: Unit for Avogadro's Number

Postby Timmy Nguyen Dis 1I » Sat Oct 19, 2019 9:50 pm

Avogrado's number can be used to describe any unit. It's just that any 1 mole of something = 6.02 x 10^23

faithkim1L
Posts: 105
Joined: Fri Aug 09, 2019 12:17 am

Re: Unit for Avogadro's Number

Postby faithkim1L » Sat Oct 19, 2019 10:13 pm

The answer depends on each problem. Avogadro's number represents the number of (mcls, atoms, ions) per mol of the given element or compound.

Tiffany_Chen 2K
Posts: 106
Joined: Fri Aug 30, 2019 12:15 am

Re: Unit for Avogadro's Number

Postby Tiffany_Chen 2K » Sat Oct 19, 2019 11:07 pm

Avogadro’s number can be towards any unit, as long as it’s represented as 6.022*10^23unit/mol.

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

Re: Unit for Avogadro's Number

Postby Brian J Cheng 1I » Sat Oct 19, 2019 11:16 pm

Avogadro's number is used to convert mols to virtually any unit. Think of it as the number of "something" in one mole of this "something". It can be the amount of atoms in 1 mole of atoms, or even the amount of jelly beans in one mole of jelly beans.

Ethan Low 1L
Posts: 24
Joined: Wed Sep 18, 2019 12:15 am

Re: Unit for Avogadro's Number

Postby Ethan Low 1L » Sun Oct 20, 2019 6:56 pm

Avogadro's number or constant is basically the same constant number 6.0221 X 10^23.

The way you should think about it is the number of atoms, within 1 mole of that particular atoms (its referring to the number of atoms)

Note that different elements would have different sizes of each individual particle, but in the end they have the same number of atoms that will be 6.0221 X 10^23.

Hope that helps! (:


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

Who is online

Users browsing this forum: No registered users and 4 guests