Atoms, Molecules, and Formula Units

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Tiffany Dong_4e
Posts: 51
Joined: Wed Sep 11, 2019 12:17 am

Atoms, Molecules, and Formula Units

Postby Tiffany Dong_4e » Sat Oct 05, 2019 6:15 pm

How is it possible that Avogadro's Constant can be used to find atoms, molecules, and formula units? Does whichever item you're finding depend on the substance involved in the problem?

jvera4b
Posts: 60
Joined: Wed Sep 11, 2019 12:17 am

Re: Atoms, Molecules, and Formula Units

Postby jvera4b » Sat Oct 05, 2019 6:32 pm

You can find atoms, molecules, and formula units using Avogadro’s constant because scientists have determined 6.022x10^23 of atoms/particles/ molecules is equal to 1 mol. You can use the substance’s molar mass to calculate what is being asked for. For example if you were given to find the mass of an element with x amount of atoms then you know that one mole of the element is 6.022^23 atoms. If you divide the amounts Then that would result in moles at which point you can multiple by the molar mass to reach grams.

Jessa Maheras 4F
Posts: 121
Joined: Fri Aug 02, 2019 12:16 am

Re: Atoms, Molecules, and Formula Units

Postby Jessa Maheras 4F » Sat Oct 05, 2019 6:54 pm

When I have asked this question before, I think the most helpful answer is that Avogadros number is simply a quantity. Just as a "dozen" donuts represents 12 donuts, Avogadro's number of donuts would be 6.02x10^23 donuts. Avogadro's number can be used to quantify anything, but we use it frequently when discussing atoms, molecules and formula units because they are so small. Does that make sense? If not, I can explain further.:)

HanaAwad_4B
Posts: 45
Joined: Fri Aug 30, 2019 12:18 am

Re: Atoms, Molecules, and Formula Units

Postby HanaAwad_4B » Sat Oct 05, 2019 9:47 pm

You have to think of each of these terms as a unit. Even though molecules have more atoms, they are still joined, thus they are one unit. The same thing applies to formula units. This is why Avogadro's number applies to all of it. An easy way to think of Avogadro's number is the same way to think about a dozen. You can have a dozen of anything. You can have a dozen loaves of bread. Even though there are multiple slices of bread, the term dozen still accounts for all of it.

Martina
Posts: 111
Joined: Thu Jul 25, 2019 12:16 am

Re: Atoms, Molecules, and Formula Units

Postby Martina » Sat Oct 05, 2019 11:51 pm

Avogadro's Constant is a quantity that can be used for any item. It just the amount of those items so it can be used for atoms, molecules, or anything else.


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