[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":

Cho m gam hỗn hợp FeS2 và Fe3O4 có cùng số mol tác dụng vừa đủ với 500 ml dd HNO3 x M, đun nóng thu đc dd A; 14,336 lít hỗn hợp khí B (đktc) gồm NO2 và NO có tỉ khối hơi với hỉđo là 19. Giá trị của m và x lần lượt là:
A. 28,16 và 3,2
B. 14,8 và 3,2
C. 14,8 và 1,6
D. 28,16 và 1,6

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Posted by Vua Hài Kịch to Học Để Thi at December 15, 2018 at 9:36 AM

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