### avogadro number

Posted:

**Thu Oct 03, 2019 9:37 pm**Can someone explain to me what exactly the avogadro number is and how we use it?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=26&t=46213

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Posted: **Thu Oct 03, 2019 9:37 pm**

Can someone explain to me what exactly the avogadro number is and how we use it?

Posted: **Thu Oct 03, 2019 9:43 pm**

Avogadro's constant is 6.0221 x 10^23 mol^-1. Avogadro's number is typically used to convert between number of moles and the # of atoms, ions, or molecules!

Posted: **Thu Oct 03, 2019 9:47 pm**

Avogadro's number (6.022 x 10^23) represents the amount of something (for example atoms) contained in 1 mole of a substance. One way we have used it so far is when converting from number of atoms to moles, or vice versa. If given the amount of atoms, divide by Avogadro's number to find the amount of moles. If given the amount of moles, multiply by Avogadro's number to find the amount of atoms.

Posted: **Thu Oct 03, 2019 9:48 pm**

The number of units (atoms, molecules, compounds, etc.) in a mole.

Posted: **Fri Oct 04, 2019 1:28 am**

One mole has 6.022 x 10^{23} (or Avogadro's number!) of something. Moles do not always have to be used for molecules and atoms, but they typically are associated with them since Avogadro's number is very large. For example, if you are given a certain number of atoms of an element, you can find the number of moles of that element by dividing the given number of atoms by Avogadro's number (1 mole = 6.022 x 10^{23}). :)

Posted: **Fri Oct 04, 2019 1:28 am**

avogadro's number is used to determine how many "formula units" are in one mole. if you're talking about a molecule, make sure you're using the constant and converting to molecules. Whereas if you have an atom, it's 6.022E23 atoms=1 mole

Posted: **Fri Oct 04, 2019 12:37 pm**

Avogadro's constant is 6.02x10^23, and you use it when you want to determine how many "formula units" (you might see this term in the textbook!) are in a mole. Most times it is used to calculate how many atoms / molecules are in a mole of substance.

Posted: **Fri Oct 04, 2019 12:39 pm**

I believe for this class that we are supposed to use 6.022 x10²³ for Avogadro’s number.