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### Unit Conversions

Posted: Tue Oct 01, 2019 10:11 am
How do you convert atoms to moles?

### Re: Unit Conversions

Posted: Tue Oct 01, 2019 10:15 am
To convert from atoms to moles you will need to use Avogadro's number (6.022x10^23). We learned that I mole contains 6.022x10^23 atoms). In order to convert moles multiply the number of moles by 6.022 x10^23 and then you should be able to find the number of atoms. If you would like to convert the number atoms to the number of moles you will do the opposite and instead divide atoms by 6.022x10^23.

### Re: Unit Conversions

Posted: Tue Oct 01, 2019 10:16 am
Typically, one would use dimensional analysis to do so. Using the definition of 1 mole = 6.022 x 10^23 atoms, you can convert from moles to atoms or atoms to moles. For example, if you have 10 moles of Carbon, you would multiply this number by 6.022 x 10^23 to find the number of atoms in the sample. On the other hand, if you have 10 Carbon atoms and want to convert to moles, you would divide 10 by 6.022 x 10^23 to find the number of moles. Hope this helps!

### Re: Unit Conversions

Posted: Tue Oct 01, 2019 10:24 am
To convert from atoms to moles, you would divide the number of atoms by 6.022 x 10^23 (Avogadro's constant) to get the number of moles. It would be helpful to memorize that the number of objects (ions, atoms, or molecules) = amount of moles x Avogadro's constant and rearrange the equation to solve for what exactly you are looking for.

### Re: Unit Conversions

Posted: Tue Oct 01, 2019 11:27 am
You use the the conversion:

1 mole = 6.022 * 10^23 molecules/atoms

### Re: Unit Conversions

Posted: Wed Oct 02, 2019 7:11 pm
You typically convert moles to atoms by multiplying by Avogadro's constant (6.022 * 10^23). You can also use this when the problem asks you to convert to formula units.

### Re: Unit Conversions

Posted: Thu Oct 03, 2019 12:05 am
You will need to use Avogadro's number which is 1 mole = 6.022*10^23 atoms. For example if you want to convert 12g of Na to atoms you will first need do 12g Na* (1 mole Na / 22.98g Na) which gives you the answer of 0.52 moles of Na. Then you calculate 0.52 moles Na * (6.022*10^23 atoms / 1 mole Na) which gives you the number of atoms. It's helpful to look at the units as in the calculation all units should cancel out at last except number of atoms.

### Re: Unit Conversions

Posted: Thu Oct 03, 2019 1:02 am
You will have to use Avogadro's number, which states that 1 mol of a substance contains 6.022 x (10^23) atoms of it. Thus, you take however many (x) mols you have, and multiply it to Avogadro's number.
Thus, you have the equation: x mol * (6.022 x (10^23) atoms / mol), which cancels the mols out and leaves you with "x" atoms.

### Re: Unit Conversions

Posted: Sat Oct 05, 2019 11:23 pm
I have this diagram that my Sophomore year chemistry teacher gave us for finding ways to get moles. Is dividing monatomic atoms by Avogadro's number the same thing as going from atoms to moles or does that require you to go from atoms to molecules and then moles?

### Re: Unit Conversions

Posted: Sun Oct 06, 2019 3:59 pm
All you need for going back and forth between moles and atoms is Avogadro's number because all a mole really is is a term for an "amount of things" so to speak. So, just like 1 dozen cookies is 12 cookies, 1 mole of atoms is 6.022x10^23 atoms. Hence, to convert from moles to atoms you multiply the amount of moles you have by 6.022x10^23 and to convert from atoms to moles you divide the amount of atoms you have by 6.022x10^23.

### Re: Unit Conversions

Posted: Sun Oct 06, 2019 4:32 pm