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exobts0109
2 năm trước
Bài 1: Hòa tan 13,6g hỗn hợp A gồm Mg,Fe trong dung dịch HCl vừa đủ thu được m gam hỗn hợp muối B gồm MgCl2, FeCl2 và 6,73 lít khí H2( ở đktc). Tính H%
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