Câu 36: A

Câu 37: D

Câu 38: C

Câu 39: C

Câu 40: B

Câu 41: D

thank bạn nhìu , không biết tí nx bạn còn online khum , nếu còn vô chỉ bài mình nha :3

30= 15

40 = 20

ƯCLN (30,40)= 10

37. They used to go to school by bike when they were young

38. Quang suggested that they sould visit the Royal Citadel first

39. The car was too expensive for my dad to buy

40. My teacher told me to follow his instruction if I wanted to pass that module

38 Quang suggested that the Royal Citadel should be visited first 

39 The car was too expensice for my dad to buy

40 My teacher told me to follow his instructions if I wanted to pass this module

35 The man whose motorbike broke down had difficulty in restarting it 

36 UFOs are just exist only in the imagination of some writers and they do film for entertainment

37 No one in his class has more English books than John

38 Because of the severe storm, we couldn't go to the beach

39 This is not the first time they have visited China

40 The victims who were injured in the accident were taken to the hospital yesterday

35. The man whose motorbike broke down had difficulty in restarting it

36. UFOs are just the imagination of some writers and they do exist only in films for entertainment

37.No one in the class has as many English books as John 

38. Because of severe storm,we can't go to the beach

39. the first time I have visited China

40. The victims who are injured yesterday were taken to the hospital.

mình làm vậy chứ cũng ko chắc 100% lắm

37 He suggested that Sue buy that picture as an anniversary present for Jack

38 You know the man who sat next to me at the meeting last night, don't you?

39 Covid 19 prevented us from travelling to Da Lat

40 If I had much money, I could buy that house immediately

40 Ba suggested that face mask should be worn when going out in public.

37. If he weren't lazy, he wouldn't get bad marks.

38. The boys felt interested in the show.

39. My brother had the vet examined his pet dog last week.

40. Ba suggested that face mask should be worn when going out in public.

Câu 3: A,B,C

\(CO_2+Ca\left(OH\right)_2->CaCO_3\downarrow+H_2O\)

\(SO_2+Ca\left(OH\right)_2->CaSO_3\downarrow+H_2O\)

\(Ca\left(OH\right)_2+H_2S->CaS+2H_2O\)

Câu 4: C

\(\left\{{}\begin{matrix}\%Ca=\dfrac{40.1}{100}.100\%=40\%\\\%C=\dfrac{12.1}{100}.100\%=12\%\\\%O=\dfrac{16.3}{100}.100\%=48\%\end{matrix}\right.\)

Câu 5: B

Câu 6: B

Câu 7: A

\(n_{H_2O}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\)

Câu 8: C

\(n_{CO_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

Câu 9: D

 \(M=\dfrac{8}{0,2}=40\left(g/mol\right)\)

c3: a(CO2)

đáp án chi tiết:\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\)

    sự kết tủa trắng

câu này chọn SO2 cũng đúng, bn hỏi gv lại thử xem:>

c4:C

c5:B(SO2)

c6:B( còn có tên gọi chung là:nuclon)

c7:A(lấy 9.1023:6.10^23)

c8:C(lấy 6.72:22.4)

c9:D

 Mchất này=8:0,2=40g/mol

MNaOH=40g/mol nên chọn D

mik lên bảng làm bài này đúng đó nha

làm đi ak

29 better

30 consumption

31 qualified

32 environmentalists

33 destroyed

34 abruptedly

VIII

35 Tet is the best time when family member from all over the country come back home

36 The parents felt happy when they were informed about their children's examination results 

IX

1 Because of performing excellently at AFC tournament, everybody admired U23 VN 

2 I have not heard that news from my close friend for 2 days

3 Robinson Crusoe novel, which was bought by my father last week, is interesting

4 Our teacher advised us to wear medical face mask when going out

better thêm s bạn ơi

Mk gửi câu hỏi dễ nhé?

 thì bạn trả lời câu nào chả được ^^