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phatthanhdo8h
2 năm trước
Đốt cháy 4,48 lít khí metan (đktc) trong không khí. a/ Tính thể tích khí oxi cần dùng? b/ Tính thể tích không khí cần dùng, biết thể tích khí oxi chiếm 20% thể tích không khí?
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