[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":

Nung m (g) Fe trong không khí, thu được 104,8 g hỗn hợp rắn A gồm: Fe, FeO, Fe2O3, Fe3O4. Hòa tan A trong dd HNO3 dư, thu được dd B và 12,096 lít hỗn hợp khí NO và NO2 (ĐKC) có tỉ khối hơi đối với He là 10,167. Khối lượng m (g)
a) 74,8 g
b) 87,4 g
c) 47,8 g
d) 78,4 g

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Posted by Vua Hài Kịch to Học Để Thi at December 15, 2018 at 9:39 AM

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