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caterinaveselo
@caterinaveselo
July 2022
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Вычислите массовую долю железа в оксиде железа (II) и оксиде железа (III).
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Centaurea
Оксид железа (||) – FeO.w(Fe)=Ar(Fe)/Mr(FeO)×100%=56/72×100%≈80%Оксид железа (|||) – Fe²O³.w(Fe)=Ar(Fe)/Mr(Fe²O³)×100%=112/160×100%=70%
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