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linhbinhyen
2 năm trước
. Hoà tan 7,5 g hỗn hợp X (gồm Al và Mg) trong HCl 0,4M dư thu được 7,84 lít H2 (ở đktc) và dung dịch A. a.Tính khối lượng từng kim loại trong hỗn hợp X. b*.Tính thể tích dd HCl đã dùng biết dùng dư 10% so với phản ứng
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