1.

A macromolecule of iron has molar mass 2800amu, it contains 8% iron by mass. The number of iron atom in one formula unit of the macromolecule is:

Answer»


Solution :Number of IRON atoms in one formula UNIT of compound
`=(%)/(100)xx("Molecule mass")/("Atomic mass")=(8)/(100)xx(2800)/(56)=4`


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