Answer:
Fe3O4(Magnetite)
Step-by-step explanation:
The mass percent composition of iron for Fe2O3(hematite):
% Fe = 111.70g/159.70g X 100% = 69.944%
The mass percent composition of iron for Fe3O4(magnetite):
72.359%
The mass percent composition of iron for FeCO3(siderite):
48.203%
Thus, Magnetite ore Fe3O4 has the highest iron content i.e. 72.359%