Cho 12,8 gam hỗn hợp hai kim loại Ag, Al tác dụng với Vml dung dịch H2SO4 loãng thu được 6,72 lít khí H2(đktc) a. Tính thành phần phần trăm mỗi kim loại ban đầu. b. Tính khối lượng muối thu được. c. Tính thể tích dung dịch H2SO4 3M đã phản ứng.

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Mọi người giúp em với, em cần gấp lắm ạ II. Give the correct form of the words in the brackets in each of the following sentences. 1. She prefers a book written only in English to a ________ one. (lingual) 2. People who are interested in exploring new things always want to take ________ trips. (adventure) 3. If you are a/an ________ person, you cannot become a good teacher. (patience) 4. My sister is really happy with her new job because of its high salary and ________. (flexible) 5. Although his job is quite good, he still wants to look for another job which provides him more ________ opportunities. (promote) 6. My 8-year-old brother wishes to become an excellent computer ________ when he grows up. (program) 7. Lan made all of us surprised when she said that she would become a ________. (poem) 8. The variety of dialects and accents in English is one of the biggest challenges to ________ English speakers. (native) 9. My close friend's grandfather is a famous scholar in linguistic field. He is very ________. (knowledge) 10. She ________ the word, so her foreign friend couldn't understand what she meant. (pronounce) 11. In most of the ________ companies, employees are required to use English competently. (nation) 12. Peter has still been ________ for over the past 6 months. I hope that he will soon find a job. (employ) 13. It is good that youngsters nowadays become more and more ________ in not only their thinking but also their behaviours. (depend) 14. Astronomy is the science that studies the ________ and its objects such as the moon, the sun, planets and stars. (universal) 15. In my family, my mother is the person who mainly provides ________ support to the whole family. (finance) 16. Parents who are ________for their families will not make their children happy. (responsible) 17. The increasingly high ________ rates in the last six months have worried the government. (employ) 18. When the students learn about space travel, they are very curious about the state of being ________. (weight) 19. Women in the 21st century are proving their ________ roles in both families and society. (act) 20. My sister is the worst cook in the world. What she cooks is either undercooked or ________. (cook) 21. It is very interesting to work as a researcher who carries out significant ________ research to benefit people's life. (science) 22. If you are going to Son Doong Cave, you really need to book a ________ tour because you will easily get lost there. (guide) 23. My cousin, who is 26 years old now, is ________. He is running a small business in traditional crafts. (employ) 24. It is a ________ that students must have at least 6.0 IELTS to take part in that English speaking contest. (require) 25. Although she was ________ in marketing field, she still applied for that marketing company. (experience) 26. Excessive consumption of fast food increases the risk of ________. (obese) 27. In this new teaching approach, teachers become ________ to support students' active learning. (facilitate) 28. After leaving high school, he wants to be trained as a ________ athlete instead of going to university. (profession) 29. He has completed three English courses at this center, but there hasn't been any ________ in his English level. (improve) 30. In some Asian countries such as India, Pakistan, the Philippines and Singapore, English is used as the ________ language. (office)