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một bình chứa 33,6 lít khí oxi ( đktc) với lượng oxi này có thể đốt cháy hoàn toàn được a) bao nhiêu mol photpho , lưu huỳnh , cacbon b) bao nhiêu gam bột sắt , bột kẽm c) bao nhiêu mol C2H6, CO, C2H4O2
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