Help me quang cuong giúp với Cho V lít (dktc) hỗn hợp khí X gồm C2H2 và H2 đi qua ống chứa xúc tác Ni, đun nóng thu được hỗn hợp gồm 3 hidrocacbon có tỉ khối so với H2 bằng 13,5. Phần trăm thể tích khí C2H2 trong X ?

Xin chào tôi là người trong quỹ từ thiện hoidap247.com Tìm 4 từ đồng nghĩa và trái nghĩa với nhân hậu Ai làm cũng được 5 sao và cảm ơn Kể cả sao chép trên mạng cũng không báo cáo Mai sẽ ra câu hỏi từ thiện cuối cùng trong tháng 3

làm hộ mình câu 3 với ạ! Câu 3 thuộc phần vật lý ạ!! Help me!!!

Trả lời 2,3 ,4 la mã giúp mình ạ

vẽ tranh đề tài tự do ko chép mạng

tính tổng các số chia hết cho 3 lớn hơn 30 nhỏ hơn 50

put suitable prepositions into each blank: 1. did you go camping............friday. 2. l got up...........................half past five this morning. 3. nam isn't here..................the moment. 4. do you often play sports..............school? 5.we often go to the beach..................summer. 6.mai's birthay is ................................january 29th. 7.we know very little..............the oceans. 8.we can learn more............the undersea word thanks..........jacques cousteau's invention. 9.....special breathing equipment, a diver can stay underwater for a long time. 10. most....the earth's surface is water.

tìm con số tiếp theo của dãy số 5,13,29,61,125

Question I. Choose the best answer. (A,B, C or D ) 1. I like ______________ back my home village on holiday. A. comes B. come C. came D. coming 2. If the factory ________________ dumping poison into the lake, all the fish and other aquatic animals will die. A. continues B. to continue C. continued D. will continue 3.Water ________________ in the lake has made the fish die. A. pollution B. pollute C. polluted D. polluting 4. Mi and Nick like ______________ back Mi’s home village on holiday. A. comes B. come C. came D. coming 5. If the factory continues dumping poison into the lake, all the fish and other aquatic animals ________________. A. die B. to die C. dead D. will die 6. Water pollution is the ________________ in the lake has made the fish die. A. contaminating B. contaminate C. contaminated D. contamination 7. If we ______________ water carefully, more people will have fresh water. A. will use B. would use C. using D. use 8. If the factory continues dumping poison ________________ the lake, all the fish and other aquatic animals will die. A. into B. to C. about D. in Question II. Put the verbs in brackets into the correct form. 9 .If we (recycle) ________ more, we will help the Earth. 10. Factories (not dump) ______________waste into rivers if the government fine them heavily. 11. If people travel to work by bus, there (be) ______________fewer car fumes. 12. We (save) ________________thousands of trees if we don’t waste paper. 13. If we use water carefully, more people (have) ______________fresh water. 14. If you (be) ________________ the president, what would you do to help the environment ? 15. They get sick so often.If they exercised more, they (be) ________________ heathier. 16. If I (have) ________________ one million US dollars , I would build more parks in our city. 17. Quan’s mother is unhappy.If Quan tided his room every day, his mother (not be) ____so upset. 18.There isn’t a garden at house .If there were, we (grow) ________________ vegetables. Question III.Combine each pair of sentences to make a conditional sentence type 1. 19.Students are more aware of protecting the environment. Teachers teach environmental issues at school. If ………………………………………………………………………………………………… 20. Light pollution happens. Animals change their behaviour patterns. If ……………………………………………………………………………………………….. 21.The levels of radioactive polluion decrease.We switch from nuclear power to renewable energy sources. If ………………………………………………………………………………………………….. 22 .The water temperature increases.Some aquatic creatures are unable to reproduces. If……………………………………………………………………………………..................... Question IV.Write a conditional sentence type 2 for each situation, as in the example. EG : .People throw rubbish in the street.The street doesn’t look attractive. If people didn’t throw rubbish in the street, it would look attractive. 23.There are so many billboards in our city. People can not enjoy the view. If …………………………………………………………………………………………………. 24. There is so much light in the city at night.We can not see the stars clearly. If ………………………………………………………………………………………………… 25. We turn on the heater all the time. We have to pay three million dong for electricity a month. If ………………………………………………………………………………………………… 26. The karaoke bar makes so much noise almost every night. The residents complain to its owner. If ………………………………………………………………………………………………… 27.She has a headache after work every day.She works in a noisy office. If …………………………………………………………………………………………………. Question VI. Rewrite the sentences below without changing their original meaning. 28. Radioactive pollution is very dangerous. It can cause abnormal growth. [since] 29. Leaves are damaged. The tree cannot get enough food energy to stay healthy. [because] 30. I don’t have much money now, but I want to buy a house in Phu Cuong If

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