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ngothanhthinh
2 năm trước
cho 8,8 g Zn và Cu tác dụng với H2SO4 sau phản ứng thu được chất rắn A và 2,24 khí hidro ở điều kiện tiêu chuẩn. a ,viết phương trình hóa học b, tính khối lượng các chất trong hỗn hợp ban đầu
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