Предмет: Химия, автор: veronikamazutinec

скільки заліза містить 1600 кг. магнітного залізняку

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Автор ответа: mrskokip1

Ответ:

Магнитный железняк - Fe3O4 иначе - FeO*Fe2O3

M(Fe3O4)=56*3+16*4=232 г/моль

w(Fe)=56*3/232 =0,72=72%

Fe3O4 - 1600 кг

Fe - x кг

x=1600*72/232=496,5 кг

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скільки заліза містить 1600 кг. магнітного залізняку