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huongdang1508
2 năm trước
Đốt cháy hoàn toàn 0,28 lít hỗn hợp hai ankan đổng đẳng kế tiếp cần vừa đủ 3,22 lít không khí ở cùng đk. Giả thiết không khí chỉ chứa O2 và N2 với tỉ lệ phần trăm về thể tích tương ứng là 20%, 80%. XĐ CTPT hai ankan đó
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I / Use “ALTHOUGH, THOUGH” to combine each pair of these sentences 1. He often tells lies. Many people believe him. _______________________________________________________________________ 2. She didn’t eat much. She was hungry. _______________________________________________________________________ 3. He is over 60. He doesn’t wear glasses. _______________________________________________________________________ 4. It got dark. The continue to work. _______________________________________________________________________ 5. She kept on studying. It was noisy. _______________________________________________________________________ 6. He ate all the fruits. They were green. _______________________________________________________________________ 7. We could do the test. It was very difficult. _______________________________________________________________________ 8. He is very strong. I’m not afraid of him. _______________________________________________________________________ 9. The plane took off. The weather was bad. _______________________________________________________________________ 10. He didn’t stop his car. The traffic lights turned red. _______________________________________________________________________

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