Вопрос школьника по предмету Химия
при получении железа из оксида железа (3) методом алюминотермии получено 14 г железа. Определите массу израсходованного алюминия.
Ответ учителя по предмету Химия
Xg yg 14g
Fe2O3+2Al =2 Fe+Al2O3
160g 54g 112g
x=160·14/112=20g (Fe2O3)
y=54·14/112=6.75g (Al)
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