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2 năm trước
Oxi hóa hoàn toàn m gam hỗn hợp X gồm Mg và Al cần dùng vừa đủ 2,688 lít (đktc) hỗn hợp khi Y gồm O2 và Cl2 (tỉ lệ mol tương ứng là 1:2), sau phản ứng thu được 10,26 gam hỗn hợp Z gồm các oxit và muối clorua. Khối lượng của Al có trong m gam hỗn hợp X là
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