Cho một hỗn hợp khí gồm CH4 và Cl2 a) Làm thế nào để phản ứng xảy ra b) Bằng cách nào để nhận biết được phản ứng đã xảy ra Em cảm ơn ạ.

Nick: How's your international summer camp going, Phong? Phong: Awesome, just awesome. Nick: You sound so happy. What do you like about it? Phong: It's hard to say. Everything's wonderful: the friends I've made, the places I've visited, the activities... Nick: Oh...Your English has improved a lot! Phong: Absolutely. I use English every day, with people from different countries. Nick: Where are they from? Phong: Everywhere! Places like India, Canada... English is also an official language here in Singapore. Nick: Right. Have you made any friends from English speaking countries? Phong: I'm in a team with two boys from Australia and a girl from the USA. Nick: Do you have difficulty understanding them? Phong: I found it difficult to understand them at first. Perhaps it's because of their accent, but it's OK now. Nick: It's great that you can practise English with native speakers. When are you back? Phong: Our camp closes on July 15th and I take the night flight home the same day. Nick: Looking forward to seeing you then. Enjoy Phong: I will. Thanks. Bye. TÓM TẮT CUỘC HỘI THOẠI!!!! CẢM ƠN!

Tìm nghiệm của hệ phương trình bằng phương pháp thế -4x-3y=6 -x-3y=6

Cho m(g) hh gồm Al, Ag vào dd HCl dư. Sau pu thu đc 3,36l khí và 3,2g chất rắn ko tan. Tính m(g). Giúp mk bài này vs.

giải phương trình chứa ẩn ở mẫu x+1/x=x^2+1/x

III. Complete each sentence with a compound noun made from two words from the box. air bus car center city failure hour jam park parking pollution power rush shortage stop strike ticket traffic train water 47.The roads were crowded and I was stuck in a ................................................ for hours. 48.The ................................................ is bad in this city. It’s getting hard to breathe! 49.All the lights went out because there was a ................................................ 50.I left my car in the wrong place and the police gave me a ................................................ 51.I couldn’t use the railway yesterday because there was a ................................................ 52.I had to pay a fortune to leave my car in a multi-storey ................................................ 53.I waited at the ................................................ for hours but all the buses were full. 54.There is always a lot of traffic during the ................................................ 55.It doesn’t rain a lot here, and at the moment there is a ................................................ 56.The Government has decided to ban all cars from the ................................................

Em học đi gì từ văn bẳn vượt thác

$\frac{x+2}{20}$=$\frac{2}{-8}$ Please~~~mik cảm ơn trước nhá

Tại sao đất có màu đen lại màu mỡ nhất ?

chọn giúp mình a, b, c, d nhaaaaaaaaaaa