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conlongoitinh
2 năm trước
cho 7,8 g một kim loại thuộc nhóm 1a trong bảng tuần hoàn tác dụng hoàn toàn với dung dịch HCl dư sau phản ứng thu được dung dịch x và có 2,24 lít khí thoát ra (đktc) a viết phương trình hóa học dạng tổng quát b xác định tên kim loại c tính khối lượng muối clorua khan thu được d tính khối lượng dung dịch HCl 20% để tham gia phản ứng
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