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quyhuongho
2 năm trước
1.Trộn V1 lít N2 với V2 lít H2 thu đc hh X. Tỉ khối của X so với H2 là 10,5. Tìm V1:V2 ( biết các khí đo ở cùng điều kiện nhiệt độ, áp suất) 2. Cho 2,4g kim loại M hóa trị(II) tác dụng với dd HCl lấy dư, sau khi phản ứng kết thúc thu đc 2,24 lít khí H2 (đktc). Xác định kim loại M
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