Hòa tan 1,2g Mg bằng dd HCl 3M a/ viết PTHH của phản ứng b/ Tính thể tích khí thoát ra ở đktc C/ tính nồng độ mol của dd thu đc sau phản ứng.

viết cách làm bài 7 hộ em với ạ

ctlhn mn nha !!! thanhks mn !!!!

Giải giúp em câu 8, 10 tới 14 nha

Cho đường tròn tâm O đường kính AB. Vẽ dây cung CD vuông góc với AB tại F. Trên cung BC lấy điểm M. Nối A với M cắt CD tại E. 1,Chứng minh AM là phân giác của góc CMD 2,Chứng minh EFBM nội tiếp 3,AC2=AE.AM 4,Gọi giao điểm CB với AM là N;MD với AB là I.Chứng minh NI//CD 5,Chứng minh N là tâm đường tròn nội tiếp tam giác CIM

Cho a,b thỏa mãn a+b=1. Chứng minh rằng: a)a^2+b^2 lớn hơn hoặc bằng 1/2 b)a^3+b^3 lớn hơn hoặc bằng 1/4 Mn giúp e vs ạ e xin cảm ơn

.Complete each sentence so that it has the same meaning as the first one. (1 pt) 1. What is the price of a dish of five – coloured sticky rice?  How much _____________________________________________________? 2. The girl worked hard. Her stepmother wasn't happy .  Although________________________________________________________. 3. Would you please change this T-shirt for me?  Do you mind ___________________________________________________? 4. A lion can run 100km/hr while a horse can run 80km/hr.  A lion can _______________________________________________________

Qua văn bản trên đã bồi đắp cho em tình yêu quê hương đất nước .Em hãy nêu những việc làm để thể hiện tình cảm đó. Giúp với

16. The club is called Happy Day. I often see my bilingual friend in Happy Day. A. I often see my bilingual friend in the club which is called Happy Day. B. The club in which I met my bilingual friend is called Happy Day. C. I often see my bilingual go to the club whose name is Happy Day. D. The club is called Happy Day which I often see my bilingual friend in Happy Day. 17. Ray is my cousin. I sometimes translate a few English articles for Ray. A. Ray who sometimes translates a few English articles for me is my cousin. B. My cousin who is called Ray sometimes translates a few English articles for me. C. My cousin whom I sometimes translate a few English articles for is called Ray. D. Ray is my cousin who I sometimes translate a few English articles for Ray. 18. It is important to drain the prawns after finishing boiling them. A. You cannot drain the prawns when the boiling process finishes. B. You must boil the prawns when the draining process finishes. C. You must not drain the prawns when the boiling process finishes. D. You must drain the prawns when the boiling process finishes. 19. “ Why do pickpockets often prefer crowed places?”, asked Tom. A. Tom wondered why pickpockets often preferred crowed places. B. Tom asked if pickpockets often prefer crowed places. C. Tom wondered whether pickpockets often prefer crowed places. D. Tom wondered if pickpockets often prefer crowed places. 20. After the chicken is cooked, please slice and combine it with the prepared mixture. A. Combine the sliced chicken with the cooked mixture. B. Combine the cooked and sliced chicken with the prepared mixture. C. Combine the cooked chicken with the prepared mixture, then slice it. D. Combine the prepared chicken with the cooked and sliced mixture.

dịch hộ 2 silde......................................