Using these balanced reactions, 2C+O2=2Co Fe2O3+3Co=2Fe+3Co2
how many moles of O2 are required for the production of 3.19 kg of Fe?
A) 42.8 moles
B) 19.0 moles
C) 171 moles
D) 57.1 moles
E) 2.39 moles​

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