The number of iron atoms (Fe) are present in 3.0 mol of iron metal (Fe) is 18×10²³atoms.
What is Avogadro's number?
Avogadro's number is the number of entities which present in one mole of that substance and it is represented as:
1 mole = 6.022×10²³ atoms
In 3 mole of Iron, number of atoms will be calculated as:
3 mole Fe = 3mol × 6.022×10²³atoms/mol = 18×10²³atoms
Hence 18×10²³atoms of iron are present.
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