The conversation between human and AI assistant.
[|Human|] How many iron atoms are in a single molecule of the main component substance of ironsand?
[|AI|] The main component of ironsand is magnetite, which has chemical formula Fe3O4. Because Fe is the chemical symbol for iron and it is followed by a 3 in this formula, there are 3 iron atoms per magnetite molecule.
[|Human|] 
How many iron atoms are in a single molecule of the main component substance of ironsand?