K
kaykochan
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
cho 31.4 g hon hop Mg,Al,Fe tac dung voi dung dich HCl du thay thoat ra 19.04l H2 o dktc va dung dich A. tinh khoi luong moi kim loai, biet the tich khi H2 thaot ra do Al nhieu gap 2 lan the tich khi H2 thoat ra trong Mg.