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Answer to Question #37710 in Other Chemistry for puganesa

Question #37710
Rust contains iron(111)oxide,Fe2o3 .how many moles is iron (111) ions are present in 4.0 of rust?
Expert's answer
Fe2O3= 2Fe(3+) + 3O2(2-)
The number of moles of iron ions is two times greater than that of iron oxide. The molecular weight M(Fe2O3)=56*2+16*3=160g/mol
n(Fe)=(4/160)*2=0.05mol

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