Fe + O2 – Fe2O3 Which of the following fractions can be used for the mole ratio to determine the mass

Fe + O2 – Fe2O3

Which of the following fractions can be used for the mole ratio to determine the mass of Fe from a known mass of Fe2O3?
A. 4/2
B. 3/2
C. 2/3
D. 2/4


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