Calculating the number of atoms in X Kilograms of iron

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To calculate the number of atoms in a given mass of iron, one should use the Avogadro constant, which is approximately 6.022 x 10^23 atoms per mole. First, determine the molar mass of iron, which is about 55.85 g/mol. For 1 kg (1000 g) of iron, divide the mass by the molar mass to find the number of moles. Multiply the number of moles by the Avogadro constant to get the total number of atoms. The final answer should be expressed in scientific notation with one significant figure.
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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.
 
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Try using the Avogadro constant.
 
Nytik said:
Try using the Avogadro constant.

Whats that?
 
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