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Homework Statement
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?
Homework Equations
I need to give an answer in scientific notation
A x 10^B
A being 1 significant figure, and B being whole number
The Attempt at a Solution
No idea what to do.