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chinhle12042001
2 năm trước
Hỗn hợp X gồm H2, C4H10, C2H2, C3H6 ( mạch hở ). Nung nóng hỗn hợp X trong bình kín chứa một ít bột Ni làm xúc tác thu được hỗn hợp Y. Viết các phương trình phản ứng hóa học xảy ra
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Câu 5: Cho dạng đúng của động từ cho trong ngoặc đơn: 1. Every morning, Duong (get)..............................up at 6. She (have)....................... breakfast at 6:05. After breakfast, she (brush)........................... her teeth and (get)........................dressed. She (go)...........................to school at 6:30. She (have)...........................lunch at 11:30 at school. 2. The Bakers (decorate) .................................their house in Ha Noi Capital at the moment. 3. My little brother and sisters (be) .................................late for school. 4. Those students should not (play) ..........................games often. Look! They (play)................................ 5............. Mr. Thanh’s daughter (listen) .................................to music every night? –No, he (listen) .............................every Sunday night. He (have) .........a good CD player 6. Where ..................... (be) ......................your mother and your sister now? - They (be) .....................in the kitchen and they (cook) ..................... dinner. 7. Now, Ba (not read).............................a newspaper, he (play)....................chess with his friend, Cuong. 8. What .....................you (do) ..................... now, Ha and Huy? - I (be) .....................a student but Huy (be) ...................... a dentist. 9. Where ......................you (go) ......................now? We (go)...................to the market . 10. Thanh Nguyen is cooking and Ngoc Anh (do) ......................the housework. 11. Thang isn`t in the bedroom. He (play) ......................in the garden with his father. 12. The sun (rise) ......................in the east and (set) ......................in the west. 13. How ......................he (travel) ...................... to work? – He (go) ......................by car.

Read the articles about vitamins boosting student's brainpower. Choose a word from the box to fill in each gap to complete the passage. (5 pts) by could tested how teaching ones that improved when concentrate during those Vitamins that boost student's brainpower A secondary school has claimed to have (1)_________ their students’ reading and writing skills (2)_________ giving the children vitamins. Children took the vitamins and had three extra lessons (3)___________ the three month experiment. The children who took the vitamins (4)_____________ read and write better than (5)____________ who didn’t. The children were also able to (6)_____________ better on their homework. The children were (7)_________ on their reading and writing skills before and after the experiment. Teachers found (8)____________ after the experiment, 58% of the children had improved their spelling and writing skills and 38% had improved their spelling and writing skills. Teachers believe that the experiment shows (9)_____________ a poor diet with not many vitamins affects children’s learning. The school now has lessons (10)_____________ the children how to eat healthily.

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