[Học Để Thi] New comment on Tuyển tập những bài tập Hóa Học Hay.

Trang Ánh Nam has left a new comment on your post "Tuyển tập những bài tập Hóa Học Hay":

hòa tan hoàn toàn kim loại A vào dung dịch HNO3 loãng thì thu được dung dịch X và 0.2 mol khí NO. Hòa tan hoàn toàn kim loại B vào dung dịch HNO3 trên chỉ thu được dung dịch Y.
Trộn X và Y được dung dịch Z. Cho NaOH dư và Z thì thu được 0.1 mol khí và kết tủa D. Nung D đến khối lượng không đổi thu được 40g chất rắn. Biện luận tìm A, B. Biết A, B đều có hóa trị II, tỉ lệ khối lượng nguyên tử của chúng bằng 3:8, cả 2 kim loại này đều có khối lượng nguyên tử lớn hơn 23 và nhỏ hơn 70

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Posted by Trang Ánh Nam to Học Để Thi at December 7, 2018 at 4:11 PM

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