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dunghuyen6272
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đốt cháy 16,8g Fe trong V lít khí Oxi vừa đủ thì thu được Fe2O3. Cho toàn bộ lượng Fe2O3 tạo thành sau phản ứng này tác dụng với m(g) H2SO4, thu được sản phẩm gồm Fe2(SO4)3 và H2O. Tìm V và m
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