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

by negation
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negation
#1
May7-14, 10:45 AM
P: 819
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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adjacent
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May7-14, 10:56 AM
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Dealing with these has reminded me why I hated chemistry.

What is the relationship between the above 3?
http://en.wikipedia.org/wiki/Avogadro_constant
adjacent
#3
May7-14, 10:59 AM
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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.

Borek
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May7-14, 11:14 AM
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Avogadro's constant, number of moles, number of particles

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Given atomic weight of nitrogen and Avogadro's constant, can the number of moles be found?
Number of moles of what?
negation
#5
May7-14, 11:15 AM
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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 physic assignment called that atomic weight which throws in further confusion.

1 mole = 1 atomic mass of Nitrogen?
negation
#6
May7-14, 11:17 AM
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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?
adjacent
#7
May7-14, 11:30 AM
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That's new. My physic assignment called that atomic weight which throws in further confusion.
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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.
Borek
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May7-14, 11:34 AM
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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?
negation
#9
May7-14, 11:51 AM
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Number of moles of nitrogen in what?

In 28g?
Borek
#10
May7-14, 01:02 PM
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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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