Avogadro's constant, number of moles, number of particles

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Discussion Overview

The discussion revolves around the relationship between Avogadro's constant, the number of moles, and the number of particles, specifically in the context of nitrogen. Participants explore whether the number of moles can be determined given the atomic mass of nitrogen and Avogadro's constant, touching on concepts from chemistry.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants question the relationship between Avogadro's constant, atomic weight, and the number of moles, seeking clarification on how these concepts interrelate.
  • It is proposed that the number of moles can be found using the atomic mass of nitrogen, with one participant stating that 1 mole equals the atomic mass of nitrogen.
  • There is a correction regarding terminology, where one participant emphasizes that "atomic weight" should be referred to as "atomic mass."
  • Some participants express confusion regarding the definitions and relationships, particularly in the context of a physics assignment that used different terminology.
  • One participant suggests that if 28 g of nitrogen has a molar mass of 28 g/mol, then it is trivial to determine the number of moles, likening it to a simple arithmetic question.

Areas of Agreement / Disagreement

The discussion contains multiple competing views and remains unresolved regarding the clarity of terminology and the relationship between the concepts discussed. Participants express differing opinions on whether Avogadro's constant is necessary for determining the number of moles.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about the definitions of atomic weight versus atomic mass, as well as the context in which the number of moles is being calculated.

negation
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Dealing with these has reminded me why I hated chemistry.

What is the relationship between the above 3? Given atomic weight of nitrogen and Avogadro's constant, can the number of moles be found?
 
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negation said:
Given atomic weight of nitrogen and Avogadro's constant, can the number of moles be found?

You don't need Avogadro's constant there.
1 mole = Atomic mass of Nitrogen

You should never call that atomic weight. It's atomic mass.
 
negation said:
Given atomic weight of nitrogen and Avogadro's constant, can the number of moles be found?

Number of moles of what?
 
adjacent said:
You don't need Avogadro's constant there.
1 mole = Atomic mass of Nitrogen

You should never call that atomic weight. It's atomic mass.
That's new. My physics assignment called that atomic weight which throws in further confusion.

1 mole = 1 atomic mass of Nitrogen?
 
Borek said:
Number of moles of what?

Nitrogen. Given Avogadro's constant and the atomic mass of Nitrogen being 28g/mol, is it possible to determine the number of moles?
 
negation said:
That's new. My physics assignment called that atomic weight which throws in further confusion.

negation said:
1 mole = 1 atomic mass of Nitrogen?
Oh sorry it should be --> not =

1 mole of Nitrogen --> atomic mass of nitrogen.

So 1 mol --> 28
x -->28
Cross multiply. You get 1 mole again.
Didn't you study that?

1 mole of any element --> atomic mass of that element.I leave all these to Borek. He knows better.
 
negation said:
Nitrogen. Given Avogadro's constant and the atomic mass of Nitrogen being 28g/mol, is it possible to determine the number of moles?

Number of moles of nitrogen in what?
 
Borek said:
Number of moles of nitrogen in what?


In 28g?
 
  • #10
Yes. This is trivial - 28 g is a molar mass of N2. If you have 28 g of a substance that has molar mass of 28 g/mol, how many moles do you have?

It is like asking "how many dozens in twelve?".
 

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