Avogadro's Constant Definition

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Madelyn Romberg 3L
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Joined: Mon Oct 01, 2018 11:16 pm

Avogadro's Constant Definition

Postby Madelyn Romberg 3L » Sun Oct 07, 2018 5:28 pm

When it comes to di/tri/etc molecules, does Avogadro's constant apply? Or is it atom and not number of particles?

Michael Torres 4I
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Re: Avogadro's Constant Definition

Postby Michael Torres 4I » Sun Oct 07, 2018 6:26 pm

Avogadro's constant still applies. For example, in chlorine gas (Cl2), there are 6.022 * 10^23 molecules of Cl2 per mol. Avogadro's constant can refer to the number of atoms, molecules, or formula units depending on the substance in question.

804994652
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Joined: Thu Sep 27, 2018 11:26 pm

Re: Avogadro's Constant Definition

Postby 804994652 » Sun Oct 07, 2018 8:01 pm

I have a similar question. Sometimes questions ask for atoms of Cl2. Does this mean the individual atoms (6.02x10^23) or is it referring to the number of Cl2 atoms in a compound like ZnCl2 has 1 atom of Cl2?

Nell Mitchell 1E
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Re: Avogadro's Constant Definition

Postby Nell Mitchell 1E » Sun Oct 07, 2018 10:00 pm

A mole of Cl2 refers to 6.02x10^23 molecules of Cl2. That means there would be 1.204x10^24 individual Cl atoms.

Michael Nirula
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Re: Avogadro's Constant Definition

Postby Michael Nirula » Sun Oct 07, 2018 10:03 pm

@804994652 Answering your question, those questions should be asking "how many molecules of Cl2" because Cl2 is a molecule not a singular atom. But, maybe if they were asking about how many atoms are in Cl2, you would answer 2 in that case.

Lia Inadomi 1I
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Re: Avogadro's Constant Definition

Postby Lia Inadomi 1I » Mon Oct 08, 2018 7:59 pm

Avogadro's constant can be used as the number of particles per mole of a substance

Aili Ye 4L
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Joined: Thu Sep 27, 2018 11:16 pm

Re: Avogadro's Constant Definition

Postby Aili Ye 4L » Sat Oct 13, 2018 7:21 pm

A mole of H2 would include 6.02x1023 molecules of H2. But that would mean twice that for number of atoms.

ElliotPourdavoud 1A
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Re: Avogadro's Constant Definition

Postby ElliotPourdavoud 1A » Sat Oct 13, 2018 7:31 pm

Avogadro's constant will apply to molecules as well as individual elements it is a mol of the molecule or a mol of the atom.


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