HOC24
Lớp học
Môn học
Chủ đề / Chương
Bài học
Viết PTHH theo chuỗi phản ứng
b) C2H4 → C2H5OH → CH3COOH → CH3COONa
giải chi tiết giúp mk vớiii ạ
a) C2H2 → C2H4 → C2H5OH →CH3COOH →CH3COOC2H5 → CH3COONa
↓ ↓ C2H4Br2 (CH3COOH)2Mg
41. Youare advised to speak only english during the course
→We want ___________________________
42. He can't afford to buy the car
→ The car_______________
43. Mrs.Taylor regretted buying the second - hand washing - machine
→ Mr.s Taylor wished ____________________________
44. Unless he phones immediately he won't get information
→If
45. When she walked along the riverside , she met her old friend
→ Walking _________________________
Câu 1: Cho biểu thức A= \(\left(\dfrac{1}{\sqrt{x+1}}+\dfrac{1}{\sqrt{x-1}}-\dfrac{2}{x-1}\right)\) ; (x > 0 , x ≠1 )
a/ Rút gọn biểu thức A
b/ Tính giá trị biểu thức A tại X = 3+ 2√2
giải giúp mk vớiii ạ
7. Have you got something ? It will get ink out of the carpet
→___________________________________
8. Where's the girl ? she sells the tickets .
→_____________________
9. Half of the people didn't appear. They were invited
→__________________________
10. The festival is called Easter .It is in the late March or early April
→______________________________
giải giúp mk với ạ