Lấy hỗn hợp X gồm Na, Mg và Al theo tỉ lệ số mol nNa : nMg : nAl = 1:1:1. Đem hỗn hợp X trên cho tác dụng với khí oxi thu được hỗn hợp Y gồm Na2O, MgO, Al2O3. Xác định tỉ lệ số mol của các chất có trong hỗn hợp Y? MẤY IDOL HÓA GIẢI HỘ MÌNH NHA.CẢM ƠN Ạ

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Exercise 4. Fill each blank with a word/ phrase in the box. twice jogging doing aerobics badminton sports swimming gym games racing 1. Which……..................do you often play at the weekends? 2. My brother plays soccer…...........…..a week. He does it on Saturday and Sunday. 3. How often do you go………........................? – Every morning. 4. My friend loves to swim. He goes…..............……. Every Sunday. 5. What do you like……..................... best in your free time? 6. I like to watch motor………................... on TV. It’s really exciting. 7. Why does your brother like going to the…....................…..? – Because it is great. 8. Last weekend I played…….....................….with Mai and we had a very good time. 9. Many girls in my class like doing…….......................… to keep fit. 10. In Viet Nam, we play different……....................… during the break time. Exercise 5. Read the following passage and answer the questions: There are two main kinds of sports: team sports and individual sports. Team sports are such sports as baseball, basketball and volleyball. Team sports require two separate teams. The teams play against each other. They compete against each other in order to get the best score. For example, in a football game, if team A scores 4 goals and team B scores 3 goals, team A wins the game. Team sports are sometimes called competitive sports. 1. How many main kinds of sports are there in the world? ______________________________________________________________________________ 2. Can you name some team sports? ______________________________________________________________________________ 3. How many teams do team sports require? ______________________________________________________________________________ 4. Why do two separate teams compete against each other? ______________________________________________________________________________ 5. What are team sports sometimes called? ______________________________________________________________________________ Exercise 6. Make sentences/ questions using the words and phrases given. 1. What/ time/ you/ go/ gym/ yesterday/ ? ______________________________________________________________________________ 2. My/ brother/ favourite/ sport/ volleyball/. ______________________________________________________________________________ 3. You/ play/ blind man’s bluff/ when/ you/ young/ ? ______________________________________________________________________________ 4. I/ more/ interested/ in/ football/ than/ table tennis/. ______________________________________________________________________________ 5. Our team/ win/ match/ last Saturday/. ______________________________________________________________________________ Exercise 7.Complete each sentence so it means the same as the sentence above. 1. My father’s favourite sport is tennis. My father likes__________________________________________________________________ 2. My mother is a fast swimmer. My mother swims______________________________________________________________ 3. Lien doesn’t like doing sport very much.  Lien isn’t very________________________________________________________________ 4. Minh plays football very well.  Minh is very good_____________________________________________________________ 5. We do a lot of outdoor activities in summer. We take part in________________________________________________________________