4Fe+3O2=2Fe2O3
M(Fe)=56г/моль
n(Fe)=7/56=0,125моль
nFe:nO2=4:3
n(O2)=3*0,125/4=0,09375моль
V(O2)=22,4*0,09375=2,1л
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4Fe+3O2=2Fe2O3
M(Fe)=56г/моль
n(Fe)=7/56=0,125моль
nFe:nO2=4:3
n(O2)=3*0,125/4=0,09375моль
V(O2)=22,4*0,09375=2,1л