Hòa tan 20g Fe 2 O 3 vào dd H 2 SO 4 24,5% vừa đủ thu được dd X. Làm lạnh dung dịch X xuống t 0 C thấy tách ra 35,125 gam tinh thể Y và còn lại dung dịch bão hòa Z có nồng độ chất tan là 18,54%. Xác định độ tan của muối trong dd Z và công thức của Y.

Giúp em câu e và f bài 42 và tất cả các câu bài 43 em cần trước 1h chiều nay ạ

phân tích câu thơ thứ 2 và thứ 4 trong bài ngắm trăng

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Exercise 2. Combine each pair of sentences, using a relative clause. 1. I have a friend. Her mum is a volunteer worker. → I have a friend whose mum is a volunteer worker. 2. The rescue operation was arranged by a charity organisation. It was a success. → 3. My uncle is a fire fighter. He visited us last weekend. → 4. The storm started at 2 o’clock this morning. It caused a lot of damage. → 5. Nick is my classmate. I’ve known him for a long time. → 6. There are about one billion people. They use English as the lingua franca of international communication. -> 7. Differences between languages can cause some problems to learners. Differences between languages are explained in course books. ->

I/ Change into passive voice 15 I have met my friend at the beach. 16 Her teacher gave me a pen last month. 17 She often sweep the floor every morning. 18 No one can do the exercise. 19 They knew that he stole the car. 20 It is difficult to answer the questions 21 She will be able to meet him. 22 He is going to visit the family 23 You must sweep the room everyday 24 We have to learn English every night. 25 They must improve plumbing at the village. 26 He is going to grow vegetables in the garden. 27 She used to drink coffee at night. 28 The people can raise cows at Duc Linh. 29 Have you ever met her? 30 Who can do the exercises? 31 What are you doing?

Exercise 1. Correct the mistakes. The town 1) which I was born has changed greatly over the last twenty years. Now, there is a modern shopping centre in the place 2) that my school used to be and all the children 3) whose went there have grown up and moved away. The local cinema, 4) that was built several years ago, used to be a dance hall 5) which big bands played. The park, 6) where was my favourite place as a child, is now a car park. Some things are still the same though. Mrs Jones, 7) whom is now sixty years old, still works in the Post Office and Mr Jones still owns the baker's shop, 8) that his two sons now work. The hospital 9) where I was born in is still standing, although it is now much bigger than it was at the time 10) which I was born. The day 11) which my family and I left our home town was one of the saddest days of my life. 1. where 2………………. 3…………………… 4………………. 5……………… 6…………………… 7……………… 8……………… 9…………………… 10…………….. 11………………

Giải bóng đá Asia Cup có 16 đội tham gia trong đó có Việt Nam và Thái Lan. Bốc thăm chia 4 bảng mỗi bảng 4 đội. Hỏi có bao nhiêu khả năng Việt Nam và Thái Lan khác bảng nhau ?

Viết câu đồng nghĩa 1 Both Nam and Lan didn't stay at home yesterday We don't.... 2It is not necessary for us go to school these days We don't.... 3 My mother had some workers repaint our house last day My mother.... 10They stopped the match because the heavy rain Because....