Đốt cháy hoàn toàn m gam một mẫu cacbon chứa 4% tạp chất trơ bằng oxi. thu được 11.2l hỗn hợp khí X chứa Co và co2. sục từ từ X vào 200ml dd Y chứa BaOh2 1M và NaOh 0.5M . sau khi phản ứng kết thúc được 29.55g kết tủa. tính m và thể tích khí o2 đã dùng. Gấp lắm ạ :<

Exercise 3: Put the verbs in the present simple or the past simple 1. A: ___________________ (you/ go) to supper market yesterday? B: No, I __________. I ___________ (never/ work) on Friday 2. A: _______________ (you/ see) Charles yesterday? B: Yes. We ________ (have) breakfast together. 3. A: ____________ (Nam/ work) at a bank? B: No, She ____________. SHe __________ (work) at a post office 4. A: ____________ (you/ do) anything exciting last Saturday? B: No, not really. He_____________ (watch) TV and _________________ (read) a newspaper. It was a boring weekend. 5. A: What __________ (you/do) at weekends? B: We usually ___________(go) to the holiday

GIVE THE CORRECT WORD FORM. Question 31: Their friends wonder when they will _______ their engagement. (announcement) Question 32: The plane landed _________ after a long trip. (safe) Question 33: I thought she would be _________ with her life but actually she didn’t. (satisfy) Question 34: Students do most ____________experiments in laboratories. (biology) Question 35: My younger brother enjoys social __________. (act) REWRITE THE FOLLOWING SENTENCES. Question 36: Billy started to learn Vietnamese two years ago. →Billyhas _____________________________________________. Question 37: It’s has been 10 years since Jim last came back to his hometown. → Jim hasn’t ___________________________________________. Question 38: How long have you stayed in this city? → When _______________________________________________? Question 39: I haven’t heard anything from Kelly since our graduation.  The last time _________________________________________________. Question 40: Izzy came to my house in the middle of our dinner While _____________________________________________________.

Ai lm giùm em phần 8 la mã di ạ

3.Thành phố Hồ Chí Minh cách Vũng tàu 100km. Lúc 7 giờ, một người đi xe máy từ thành phố Hồ Chí Minh đến Vũng Tàu với tốc độ 60 km/h.a. Người ấy đến Vũng Tàu lúc mấy giờ?

giúp vớiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Em đang cần gấp ạ! Em đang cần gấp ạ. Mong mọi người giúp e Cảm ơn mọi người nhiều!

III. Word form 1. Quan takes ____________ education on Thursday afternoon. (physic) 2. The facilities in the hotel where we stayed were____________. We really enjoyed them. (comfort) 3. The stadium is ____________ with football fans. (crowd) 4. At last, the explorers had to stop their journey because of ____________ rain. (continue) 5. It’s ____________ for us to study English songs. (interest) 6. She answered the teacher’s question almost ____________. (immediate)

Hộ mk bài này ạ Nếu đc thì giải thích hộ mk ạ

Cali:vui quá trời luôn:)))))) Hihi ^~^ Tưởng năm nay ko đc quà trung thu nữa chứ. Tui đc hsg thé đc thưởng 100k trung thu. Ai vô chung vui cùng tui ko (Mn vô texting hông ) ...............🥰🥰🥰🥰🥰🥰🥰🥰