单选题 题型:单选题 题干: 2201Q16 Iron(III) oxide is reduced by hydrogen in a two-step process.Step1:3Fe2O3+H2→2Fe3O4+H2O Step2:Fe3O4+4H2→3Fe+4H2O.What is the maximum mass of iron that could be produced from 39.9 tonnes of Fe2O3? [Ar values:H=1.0 O=16.0 Fe=55.8] 选项:

A、 6.98 tonnes
B、 13.95 tonnes
C、 27.90 tonnes
D、 41.85 tonnes
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