Các bạn làm giúp mình cảm ơn Câu 1: Những PTHH nào có thể dùng điều chế hiđro trong PTN a/ Zn + H2SO4  ZnSO4 + H2 b/ 2H2O  2H2 + O2 c/ 2Al + 6HCl  2AlCl3 + 3H2 Câu 2: Lập PTHH và cho biết chúng thuộc loại phản ứng hóa học nào? a/ Mg + O2 - - > MgO b/ KMnO4 - - > K2MnO4 + MnO2 + O2 c/ Fe + AgNO3 - - > Fe(NO3)2 + Ag Câu 3: Cho 22,4g sắt tác dụng vừa đủ với axit Clohiđric. a/ Tìm khối lượng muối tạo thành. b/ Tính thể tích khí hiđro thu được ở đktc. (Biết Fe = 56; Cl = 35,5)

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Giúp mk câu2 và câu 3 hình này nha vẽ luôn hình

Các bn có thể gp mk "PHẦN II.TỰ LUẬN" câu 3 nha

Trên đường thẳng AA' lấy điểm O. Trên một nửa mặt phẳng bờ AA' vẽ tia OB trên nửa mặt phẳng bờ còn lại vẽ tia OC sap cho góc AOB=AOC=150 độ a) Tính góc BOC b) Tia OA' có phải là tai phân giác của góc BOC không? Vì sao? ko cần vẽ hình nha Giúp milk với hứa vote 5 sao

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nêu tình hình nước ta sau hiệp ước năm 1862 ?

Giúp mình b,c nhe mng :)) câu 2 nhé

BÀI TẬP VIẾT LẠI CÂU: 1, What a beautiful Christmas tree! How …………………………………………………………… 2, My sister couldn’t swim last year. My sister wasn’t ………………………………………………… 3, How much did you weigh two years ago? How heavy ……………………………………………………… 4, The road is 10 miles long. The length ……………………………………………………… 5, His height is 5 feet. He is …………………………………………………………… 6, The dictionary is 5 inches thick. The dictionary ………………………………………………… 7, How broad is the window? What …………………………………………………………… 8, It is not easy to learn English well. Learning ………………………………………………………… 9. What is the matter with you? What ……………………………………………………………

The victims on the roofs of the houses .....with food and water by the rescue team Provided B. will be provided C. were provided D. had provided I learnt from the news on TV that the earthquake ........hundred of houses. Destroys B. were destroyed C. had destroyed D. are destroyed After Nick ..........his homework, he went to bed last night. Doing B. had done C. did D. to do By the time bus ...........this morning, Duong had waited for it for half an hour. came B. to come C. had come D. coming Thousands of people ........by natural disasters every year. Are affected B. are affecting C. have affected D. were affected The roof of the building ........in a storm a few days ago. Damaged B. was damaged C. has dammaged D. has been damaged All the villages ........to safe areas before midnight last night. Evacuated B. were evacuated C. had evacuated D. had been evacuated As soon as the floodwaters .....down, people ....their houses Went – cleaned B.had gone-cleaned C. went- had cleaned D. had gone- had cleaned Hundreds of people were made ....after the flood. Homeless B. helpless C. careless D. endless An example of a natural disaster is a ....... Snowfall B. tornado C. thunder D. rainbow Mai ..........in Hai Phong for five years before she .......to Ha Noi three years ago. Had lived- move B. has lived- moved C. lived-had moved D.had lived-moved Phong told me yesterday that he .....French for a year. Learnt B. had learn C. had learnt D. has learned When there is a plane crash, a lot of .......is left. Dust B. debris C.waste D. piece Dozens of buildings ........when an earthquake measuring 7.2 on the Richter scale hit the city. Destroyed B. collapsed C. buried D. damaged By the time we got to the cinema, the film ...... A. started B. had started C. staring D. to start 16 . We cannot prevent natural disasters, but we can .........for them A. defeat B. invent C. struggle D. prepare 17. A severe topical ........is called a typhoon A. drought B. rain C. flood D. strom 18. All our beautiful forests .......if we do nothing to preserve them A. will destroy B. will be destroyed C. would destroy D. would be destroyed 19. My brother had never been aboard ........he joined the army A. since B. unitl C. during D. while 20. The family .......in the attic of their house by the flood for nine hours before help arrived A. trapped B. was trapped C. had trapped D. had been