Đốt cháy 10,8g nhom thu được nhom oxit a. Tính thể tích oxi cần dùng(đktc) b. Tính thể tích không khí cần dùng. Biết thể tích khí oxi chiếm 20% thể tích không khí c.tính khối lượng chất tạo thành (Cho biết hóa trị của al là ||| : al=27 o=16

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