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Консультация № 186510
08.08.2012, 14:13
0.00 руб.
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Какая масса хромистого железняка, содержащего 30 % Fe(CrO2)2 потребуется для получения хрома массой 0,5 т? (Ответ: 3,59 т)
Какая масса хромистого железняка, содержащего 30 % Fe(CrO2)2 потребуется для получения хрома массой 0,5 т? (Ответ: 3,59 т)
Обсуждение
11.08.2012, 02:37
общий
это ответ
Здравствуйте, Massimo!
Масса хрома mCr=500 кг
количество хрома nCr=mCr/MCr=500кг/52г/моль=9,62 кмоль
количество хромита железа nFe(CrO[size=1]2[/size])[size=1]2[/size]=nCr/2=4,81 кмоль
масса хромита железа mFe(CrO[size=1]2[/size])[size=1]2[/size]=nFe(CrO[size=1]2[/size])[size=1]2[/size]*MFe(CrO[size=1]2[/size])[size=1]2[/size]=4,81кмоль*224г/моль=1077 кг[$8776$]1,08 т
Масса руды m=mFe(CrO[size=1]2[/size])[size=1]2[/size]/[$969$]Fe(CrO[size=1]2[/size])[size=1]2[/size]=1,08т/30%=3,59 т
Масса хрома mCr=500 кг
количество хрома nCr=mCr/MCr=500кг/52г/моль=9,62 кмоль
количество хромита железа nFe(CrO[size=1]2[/size])[size=1]2[/size]=nCr/2=4,81 кмоль
масса хромита железа mFe(CrO[size=1]2[/size])[size=1]2[/size]=nFe(CrO[size=1]2[/size])[size=1]2[/size]*MFe(CrO[size=1]2[/size])[size=1]2[/size]=4,81кмоль*224г/моль=1077 кг[$8776$]1,08 т
Масса руды m=mFe(CrO[size=1]2[/size])[size=1]2[/size]/[$969$]Fe(CrO[size=1]2[/size])[size=1]2[/size]=1,08т/30%=3,59 т
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