Cho 12,7g muối sắt clorua vào dd NaOH dư trong bình kín ->9g kết tủa . Tìm CTHH của muối.

Chứng minh thương người như thể thương thân

3. This is my friend, Nga. She is a student. She goes to school from Monday to Saturday. Her school is on Nguyen Tat Thanh Street and it is big. It has five floors. Nga’s classroom is on the third floor. She is in grade 6, class 6B. There are thirty- two students in her class. Nga classes start at 2 o’clock in the afternoon and finish at 4.30. On Monday, she has math, literature and English. After school, she plays badminton with her friends. She goes home at 5.30. * Choose True (T) or False (F): (Chọn đúng hay sai): a) Nga goes to school from Monday to Saturday. …………………. b) Her school has four floors. …………………. c) Nga’s classroom is on the first floor. ………….……… d) After school, she plays volleyball. …….…………… * Answer the questions (Trả lời câu hỏi sau): a) Where is Nga’s school? ………………………………………………………………………………………………. b) How many floors does her school have? ………………………………………………………………………………………………. c) What time do her classes finish? ………………………………………………………………………………………………. d) Does she go home at 5 o’clock? ………………………………………………………………………………………………… 4. Hello. My name is Minh. I’m eleven years old and I’m in grade 6. I live in a house in the city with my mother, my father and my sister. My house is on Nguyen Trai Street. On the Thư viện đề thi thử lớn nhất Việt Nam 10 street, there is a restaurant, a bookstore and a hospital. In the neighborhood, there is a school, a stadium, a market and a temple. The stadium is very beautiful. In the afternoon, I play volleyball with my friends there. We are very happy. *Choose True(T) or False (F) 1. Minh lives in the country. ………………. 2. His house is on Nguyen Trai Street. ………………. 3. There are three people in his family. ………………. 4. He plays soccer with his friends in the afternoon. ………………. *Answer the questions (1pt.) 1. Which grade is Minh in? → ………………………………………….…… 2. Is there a bookstore on his street? → ………………………………………….…… 3. What are there in the neighborhood? → ………………………………………….…… 4. Is he happy with his friends? → ………………………………………….…… 5. Lan lives in a small house in the country. It’s beautiful here. There are many flowers in front of her house. Behind the house, there is a well.To the right of the house, there is a rice paddy and to the left of the house, there are tall trees. It’s very quiet here.She loves her house very much. Her father is a worker. He works in a big factory. Every day, he travels to work by motorbike. He works in the factory from Monday to Friday. He doesn’t work on Saturday and Sunday. * Choose True(T) or False (F). 1. Lan lives in the city. ………. 2. The rice paddy is to the left of the house. ………. 3. Her father works in a factory. ………. 4. He works six days a week. ………. *Answer the questions. 1. What are there in front of the house? → …………………………………….……………... 2. Are there any tall trees to the left of the house? →…………………………………………………… 3. Where does her father work? → …………………………………………………… 4. Does he travel to work by bike? → ……………………………………………………

Chứng minh thất bại là mẹ thành công

Giải giúp e bài 2 gấp vs ạ e cảm ơn nhìu

vẽ anime nữ cs tâm vẽ lun cái nek nha OvO

y chia 2 cộng y chia 3 cộng y chia 4 = 13

Ko dùng thuốc thử khác hãy nhận bt cacl2 , HCl, na2co3, h2so4

Chứng minh có công mài sắt có ngày lên kim

Người ta đưa ra hai cách vẽ đoạn trung bình nhân x của hai đoạn thẳng a, b (tức là x²=ab) như trong hình sau: Dựa vào các hệ thức (1) và (2), hãy chứng minh các cách vẽ trên là đúng. Gợi ý: Nếu một tam giác có đường trung tuyến ứng với một cạnh bằng nửa cạnh đó thì tam giác ấy là tam giác vuông.