[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":

Cho 12gam hỗn hợp Fe và Cu vào 200ml dung dịch HNO3 2M, thu được một chất khí (sản phẩm khử duy nhất) không màu, hóa nâu trong không khí, và có một kim loại dư. Sau đó cho thêm dung dịch H2SO4 2M, thấy chất khí trên tiếp tục thoát ra, để hoà tan hết kim loại cần 33,33ml. Khối lượng kim loại Fe trong hỗn hợp là
A. 8,4 gam B. 5,6 gam C. 2,8 gam D. 1,4 gam

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Posted by Trang Ánh Nam to Học Để Thi at December 7, 2018 at 2:27 PM

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