Cho 2,4g Mg tan hoàn toàn trong 100ml dd HCl 3M. Tính pH của dd thu được (bỏ qua sự thủy phân của Mg2+)

giúp mình đi ạ mình cần gấp huhu

Vẽ 2 góc kề bù góc xOy , góc yOz , bt xOy=60độ a) Tính góc yOz b) Vẽ tia phân giác của góc yOz . Tính góc xOt

CHUYÊN ĐỀ: WISH SENTENCES Đề bài: Viết lại câu mà nghĩa không đổi: 1. It rain today -> We wish.................. 2. She doesn't join the trip with her classmate -> She wishes...................... 3. Phong gets bad mark this semester -> He wishes....................... 4. Thu doesn't have enough time to do the test -> She wishes...................... 5. It's cold and windy -> I wish............... 6. Lan miss the bus to school -> She wishes..................... 7. I can't hear that strange noise -> I wish............................ 8. They do nothing for their mini - project -> They wish................................ 9. Hoa and Ba won't go fishing this weekend -> THey wish................................. 10. Nam's father doesn't get the promotion -> He wishes.................................... 11. My team doesn't win the game -> I wish.............................. 12. I don't know how to speak Spanish -> I wish............................... 13. The boy is too short to play volleyball -> He wishes........................................... 14. Her little brother can't swim -> He wishes................................. 15. Lan never visit the citadel in Hue -> She wishes.............................. 16. Their mother doesn't buy them new comics -> They wish..................................... 17. Tuan doesn't write the coposition -> He wishes..................... 18. Quy doesn't take part in the soccer match trainning -> She wishes....................... 19. Her mother can't drive a car -> She wishes.................................. 20. The "Y and Y" club cancels the meeting -> The members wish......................... 21. Lan can not run as fast as her friend -> She wishes..................................... 22. Thang has to stay home bacause of her sickness -> He wishes.............................. 23. The girls don't perform very well -> They wish................................ 24. Some student are late for class -> They wish................................. 25. My class make a lot of noise -> I wish....................................... 26. I didn't go shopping -> I wish................................ 27. You didn't tell them about it -> I wish....................................... 28. John didn't come to the meeting -> I wish................................. 29. He made a lot of mistake last year -> I wish................................... 30. I'm sorry I missed the film last night -> I wish..........................................

a) (x + 1) ³ b) (x - 2y) ³ c) ( 2x + y) ³ d) (x - $\frac{1}{3}$ ) ³

bao nhiêu nhân với bao nhiêu để bằng 19.[ trừ 1x19 ]. ví dụ như là 4x4 thì bằng 16

giúp e vs hứa cho 5 sao vs ctlhn

Calli: Cảm giác có người theo đuổi bỡ ngỡ thật đấy :))

giúp mình câu 14 ; 17 nhanh nhé

cho hai tập A = [ m ,m+4) , B = ( -3,5 ] . tìm m để A ∪ B = B em đang cần gấp lắm ạ , mong mọi người giúp em với