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What does it mean by 'number of particles in a substance'?

  • Thread starter HCverma
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  • #1
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Homework Statement


If, N = n × NA
Where N = Number of particles in the substance
and n = Amount of substance in moles (mol)
and NA = Avogadro Number = 6.022 × 1023 particles mol-1
To find the number of particles, N, in a substance: N = n × NA
To find the moles, n, of substance, n = N ÷ NA

Homework Equations




The Attempt at a Solution


As I know mole = given mas / atomic or molecular mass of that entities. so, n = w / M
If n = N / NA, then what does it mean by ' the number of particles'?
 

Answers and Replies

  • #2
Borek
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How is "five cars" conceptually different from "ten molecules"?
 
  • #3
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How is "five cars" conceptually different from "ten molecules"?
'Five cars' is a different thing and 'ten molecules' is a different thing. But both of them denote the numbers.
 
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  • #4
Borek
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Conceptually in both cases you have a number of objects. Where is the problem with counting the molecules?
 
  • #5
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Conceptually in both cases you have a number of objects. Where is the problem with counting the molecules?
Could you clarify your question, please?
 
  • #6
Borek
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Can you count the molecules?
 
  • #7
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Can you count the molecules?
Yes.
6.023 x 10^23 molecules of any objects make 1 mole of that object.
 
  • #8
Borek
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  • #9
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So which part of the



is not clear?
Particles mean atoms, molecules, ions.
 
  • #10
Borek
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I still fail to see where the problem is. You do know which ones you count when you are counting? You can have mole of atoms, mole of molecules, mole of ions - in general we refer to them as to "mole of substance", no matter what they exactly are. In each case it means you counted some objects, no matter what they are.

In general you can have a mole of cars, why not.
 
  • #11
OmCheeto
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what does it mean by ' the number of particles'?
...
Particles mean atoms, molecules, ions.
x particles = x atoms
x particles = x molecules
x particles = x ions

"x" = "the number of"

It's as simple as that. And no more.

ps. I saw your other thread yesterday, and decided that you seem to think "mathematically", and have trouble with "wordy answers". I can totally relate with that.
pps. Did you ever figure that one out?
 
  • #12
82
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x particles = x atoms
x particles = x molecules
x particles = x ions

"x" = "the number of"

It's as simple as that. And no more.

ps. I saw your other thread yesterday, and decided that you seem to think "mathematically", and have trouble with "wordy answers". I can totally relate with that.
pps. Did you ever figure that one out?
Yes.
 

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