Question
Geology Question on Mineralogy
If an iron ore body contains 50% hematite (Fe2O3) and 50% magnetite (Fe3O4), then the grade of the iron ore body is _____%. (Round off to two decimal places) (Use atomic weight of Fe = 55.85 amu and O = 16 amu).
Answer
The correct answer is: 70.50 or 71.50 (approx.)