SOLUTION: How many moles certain in each of the following. 1. 4.65 x 10^24 atoms Cu 2. 2.75 x 10^25 molecules CH4''.

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Question 1182367: How many moles certain in each of the following.
1. 4.65 x 10^24 atoms Cu
2. 2.75 x 10^25 molecules CH4''.
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

1.
For Cu
nCu+=+4.65%2A10%5E24atoms%2A+%281mol%2F%286.0221%2A+10%5E23atoms%29%29
nCu+=+7.72mol

2.
For CH4
nCH4+=+2.75%2A10%5E25atoms%2A+%281mol%2F%28+6.0221%2A10%5E23atoms%29%29
nCH4+=+45.7mol

Answer by ikleyn(52750) About Me  (Show Source):
You can put this solution on YOUR website!
.


            Glad to see that after my yesterday critics you learned to distinct atoms and molecules.


In Chemistry,  there is a remarkable number  N%5BA%5D = 6.0221%2A10%5E23.

It is called   "the  Avogadro number".

On Avogadro number see the sources

https://en.wikipedia.org/wiki/Avogadro_constant

https://www.scientificamerican.com/article/how-was-avogadros-number/


1.
For Cu
nCu+=+4.65%2A10%5E24atoms%2A+%281mol%2F%286.0221%2A+10%5E23atoms%29%29
nCu+=+7.72mol

2.
For CH4
nCH4+=+2.75%2A10%5E25molecules%2A+%281mol%2F%28+6.0221%2A10%5E23molecules%29%29
nCH4+=+45.7mol


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Find the difference between my post and the post by @MathLover1.