Cho a gam hỗn hợp X gồm N2CO3 và NaHCO3 tác dụng vừa đủ với 200 ml dung dịch HCl 2M thu được dung dịch Y và thoát ra 6,72 lít khí CO2 (đktc) . a.Viết các phương trình hóa học xảy ra . b.Tìm a. c.Tính thành phần phần trăm theo khối lượng các chất trong hỗn hợp X Làm đúng, chi tiết mình đánh giá 5 sao nha. Cảm ơn các bạn nhiều!!!

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(Phần II) Reading comprehension IV. Read the following passage then answer the questions: Gong culture in the Central Highlands of Viet Nam has been recognized by UNESCO as a Masterpiece of the Intangible Heritage of Humanity. Gong culture covers five provinces of the Central Highlands: Kon Tum, Gia Lai, Dak Lak, Dak Nong and Lam Dong. The masters of gong culture are the ethnic groups of Bahnar, Sedang, Mnong, Coho… The Gong Festival is held annually in the Central Highlands. In the festival, artists from these provinces give gong performances, highlighting the gong culture of their own province. For the ethnic groups of the Central Highlands, gongs are musical instruments of special power. It is believed that every gong is the symbol of a god who grows more powerful as the gong gets older. Therefore, gongs are associated with special occasions in people’s lives, such as the building of new houses, funerals, crop praying ceremonies… The gong sound is a way to communicate with the gods. Answer the questions: 1. Where does Gong culture exist? ……………………………………………………………………………………………… 2. How often is the Gong Festival held? ……………………………………………………………………………………………… 3. What do artists do in the Gong Festival? ……………………………………………………………………………………………… 4. Are Gongs pieces of folk music? ……………………………………………………………………………………………… 5. Is the gong sound a way to communicate with the ancestors? …………………………………………………………………………………………… V. Choose the correct word for each blank in the following passage. Spring is a time when there are many festivals in our country. Among them, Hoa Ban Festival is the most beautiful and interesting and it takes place in Lai Chau. It is typical of the (1)………life of the Thai people. In the second lunar month of the year, when it (2) ……..warmer and hoa ban - a kind of beautiful flower in the northwest mountainous area - blossoms, Hoa Ban Festival is (3)………... This is a great time for everyone, (4) …………… for boys and girls. The boy (4)………… the most beautiful flower and gives it to his girlfriend. This is not only a time for love but also for the Thai people to (5)………..for good crops, for happiness, and express their special thanks to the Gods and (6) …………... The festival is always full of songs and prayers. 1. A .minor B. cultural C. custom D. festival 2. A. gets B. goes C. comes D. runs 3. A. seen B. arranged C. observed D. celebrated 4. A. largely B. especially C. generally D. typically 5. A. ask B. look C. pray D. call 6. A. fathers B. relatives C. families D. ancestors Writing skills. VI. Use the suggested words and phrases to make meaningful sentences. 1. We / have / dinner / when / telephone/ ring/./ ……………………………………………………………………………………… 2. I / walk / along / street / when / sudden / I / hear / footsteps / me /./ Somebody / follow/ me /./ I / frighten / and / start/ run/./ ………………………………………………………………………………………………………… …………………………………………………………………… 3. When / we / watch / a / television program / call / “ Litte flowers” / last night/ the electricity/ go / out/./ ………………………………………………………………………………………………………… ……………………………………………………………………. 4. What/ be / you / and / friends / do / at/ 4 p.m/ yesterday / afternoon/?/ ………………………………………………………………………………………. 5. While / I / wait/ at/ the / bus stop /,/ it / start/ rain / heavily /./ ………………………………………………………………………………… Giúp m vs, m ngu Tiếng Anh

Living in Scotland Scotland is the UK’s most northern country and has around 790 islands off its coasts – 130 of which have people living on them. Scotland is well known for its stunning landscapes, beautiful beaches and lochs, which are fresh water lakes. There are over 600 square miles of lochs in Scotland including the most famous one, Loch Ness. It has a population of just over five million people which is about 8.5 per cent of the whole UK population. Over 2 million of these live in Glasgow and Edinburgh, and almost half of Scotland’s population live in the Central Belt, where both the largest city (Glasgow), and the capital city (Edinburgh) are located. Scotland also hosts one of the biggest arts festivals in the world. This is commonly known as the Edinburgh Festival but is actually made up of a number of different festivals which happen at different times of the year, though many do take place in August and September. Many people have heard of the Fringe Festival, but there are also the International Festival, the Film Festival, the Children’s Festival and the Edinburgh Mela which is an intercultural festival. Decide if the following statements are true (T) or false (F). 1. Scottish people inhabit on over 1/6 of its all islands. .................. 2. Scotland’s population is over 1/10 of the whole UK population. .................. 3. People in Scotland prefer living in other areas to big cities. .................. 4 4. There are 2 common months for Edinburgh Festival. .................. 5. There won’t be any special events exclusively for kids in this Festival .................