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Question

Convert 1.26 x 10²⁴ atoms of iron to moles

Answer 1

So there are always the same amount of atoms in any mol of any element. This is known as avagadro's number which is 6.022*10²³. So all you have to do is take the amount of atoms you have and divide it by avagadros number. So 1.26*10²⁴/6.022*10²³. This ends up being around 2.09. So there are 2.09 mols of iron.