1. Oct 29, 2011 #1

   Sun44

   

   1. The problem statement, all variables and given/known data
   
   I'm having trouble with this. I need to calculate the number of atoms in iron. How do I do this? For example if I had 1 KG of iron, how many atoms are in it?
   
   
   
   2. Relevant equations
   
   I need to give an answer in scientific notation
   A x 10^B
   A being 1 significant figure, and B being whole number
   
   
   3. The attempt at a solution
   
   No idea what to do.

    

   Sun44, Oct 29, 2011
2. 
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3. Oct 29, 2011 #2

   Nytik

   

   Try using the Avogadro constant.

    

   Nytik, Oct 29, 2011
4. Oct 29, 2011 #3

   Sun44

   

   Whats that?

    

   Sun44, Oct 29, 2011
5. Oct 29, 2011 #4

   QuarkCharmer

   

   https://www.youtube.com/watch?v=AsqEkF7hcII

    

   QuarkCharmer, Oct 29, 2011

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