[Học Để Thi] New comment on Bảo toàn mol electron.

Vua Hài Kịch has left a new comment on your post "Bảo toàn mol electron":

Hòa tan hoàn toàn 12g hỗn hợp X gồm Fe,Cu ( tỉ lệ mol 1:1) bằng HNO3 dư thu được V lít (đktc) hỗn hợp khí X gồm NO và NO2 và dung dịch X ( chỉ chứa 2 muối và axit dư). Biết tỉ khối hơi của X so với H2 = 19. Giá trị của V là:
A.2,24 B. 4,48 C. 5,6 D. 3,36

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Posted by Vua Hài Kịch to Học Để Thi at December 15, 2018 at 9:28 AM

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