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binhkaka81
2 năm trước
Cho 15 g hỗn hợp A gồm Zn và 1 kim loại M hóa trị 2 thuộc nhóm A vào dung dịch H2SO4 loãng dư thoát ra 6,72 lit khí (đktc). Nếu cho 6 g M vào dung dịch axit HCl dư thì khí thoát ra (đktc) nhỏ hơn 4 lít. Xác định M?
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