Bài 1 :Hoàn thành PT A,N2O5+H2O--->HNO3 B,Fe2O3+CO---->Fe+CO2 C,KOH+H2SO4---->K2SO4+H2O D,Ca(OH)2+H3PO4---->CA3(PO4)+H2O E,Al+O2---->Al2O3 Bài 2:quặng hematit có thành phần chính là sắt (III)oxit Fe2O3.Dùng 0,6kg khí hydro khử 18 kg quặng hematit thì thu được 11,2 kg sắt và 5,4kg nước A.lập pthh của phản ứng B.viết công thức về khối lượng của các chất trong phản ứng C.tính khối lượng của sắt (III)oxit tham gia phản ứng D.tính tỉ lệ phần trăm về khối lượng sắt (III) oxit chứa trong mẫu quặng

Giúp vs ạ!Câu c,d,e!Môn toán!Cần gấp!

Tại sao cây không quang hợp được nếu ta trồng trong phòng và chiếu đèn sáng xanh lục

Loại đèn dầu hỏa nhỏ, có bấc tròn được gọi là đèn gì?

) Nguyên văn “Chinh phụ ngâm khúc” được viết bằng thứ chữ nào? A. Chữ Hán B. Chữ Quốc ngữ C. Chữ Nôm D. Chữ Hán và chữ Nôm

1. They have very little money. They are happy. → In spite of .................................................................................................................................. 2. My foot was injured. I managed to walk to the nearest village. → Although ................................................................................................................................... 3. I enjoyed the film. The story was silly. → In spite of .................................................................................................................................. 4. We live in the same street. We never see each other. → Despite ...................................................................................................................................... 5. I got very wet in the rain. I was only out for five minutes. → Even though .............................................................................................................................. II - Rewrite sentences with In spite of / Despite (2pts) 1. Although Tom was a poor student, he studied very well. → In spite of ______________________________________________________ 2. Mary went go to school even though she was sick. → In spite of ______________________________________________________ 3. Although the weather was bad, she went to school on time. → Despite ________________________________________________________ 4. Although there was a big storm, I decided not to stay at home. → Despite ________________________________________________________ 5. In spite of his good salary, Tom gave up his job. → Although_______________________________________________________ 6. He is so young. His acting is excellent. → Although_______________________________________________________ 7. The film poster is fascinating. I don't want to see this film. → In spite of______________________________________________________ 8. Although our plan is careful, we made some mistakes. → Despite_______________________________________________________ CÁC BẠN GIÚP MÌNH VS MÌNH CẦN GẤP

các từ in đậm trong câu gió bắt đầu nỗi rào rào cùng với khuôn mặt trời tròn đang tuần ánh sáng vàng rực xuống mặt đất thuộc nữ từ loại nào

Phương trình hóa học nào sau đây viết đúng? A:2HCl + Mg → MgCl2 + H2 B:HCl + Mg → MgCl2 + H2 C:2HCl + Mg → MgCl2 + 2H2 D:2HCl + 2Mg → 2MgCl2 + H2

giúp mik nhanh nha mik cần gấp đó !!!!!!! :D:D:D

1Read the passage, and answer the questions. The Amazon River in South America is an amazing and important river for the planet. The Amazon River carries more water than any other river in the world. In fact, the Amazon River is responsible for twenty percent of fresh water that flows into the world's oceans. The Amazon River is the second longest river in the world (the Nile River in Africa is the longest), and about 6,400 km long. The Amazon River has the largest area of land that flows into the river, and more tributaries than any other river in the world - more than 200 tributaries. 61. How many percentage of fresh water flowing into the world's oceans is the Amazon River responsible for? 62. Does the Amazon River carry more water than any other river in the world? 63. How long is the Amazon River? 64. What is the longest river in the world? 65. How many tributaries does it have?