... 4.That officer announced that the meeting was delayed until next week.
5.He discovered that this cotton was grown in Egypt.
6.They promise that the performance will start on time.
7.He recommends that ... business trip to England.
4.It was announced that the meeting was delayed until next week.
5.It was discovered that this cotton was grown in Egypt.
6.It is promised that the performance will start ... the committee).
13.The broken cup is hidden in the drawer (by him).
14.This room is kept tidy (by them) all the time.
15.The party was voted a great success(by them).
16.Ann was given some bananas...
... business trip to England.
4.That officer announced that the meeting was delayed until next week.
5.He discovered that this cotton was grown in Egypt.
6.They promise that the performance will start ... director is going to take a business trip to England.
4.It was announced that the meeting was delayed until next week.
5.It was discovered that this cotton was grown in Egypt.
18.She bought some ... the committee).
13.The broken cup is hidden in the drawer (by him).
14.This room is kept tidy (by them) all the time.
15.The party was voted a great success(by them).
16.Ann was given some bananas...
... Al
2
O
3
đã tan trong TN2 .
Trong TN2 , ngòai lượng Al
2
O
3
có sẵn trong TN1 tan
hết , còn tan thêm được 2g Al
2
O
3
.Như vậy trong TN1
Al
2
O
3
đã tan hết , lượng chất rắn không tan trong ... tất cả 16+2=18g Al
2
O
3
tan trong dd
KOH . Theo PT ta có :
số mol K
2
O = ½ số mol KOH tan = 18:102 (mol)
Khối lượng K
2
O = (18:102 ). 94 = 16,59g .
Bài t an về lượng chất dư
Cho ... dư khuấy kỹ thấy còn
15g chất rắn không tan .
TN2: Nếu cho thêm vào A một lượng Al
2
O
3
bằng
50% lượng Al
2
O
3
trong A ban đầu , rồi lại hòa tan
vào nước dư .Sau TN còn lại 21g chất rắn...
... sản ra sau 1 phút
(ĐS:30V,5Ω,1500J,A
ng
=1800J ,H=83.3 %)
Bài7: cho mạch điện như hình vẽ Cho bi t R
1
=16Ω,R
2
=24Ω,R
3
=10Ω,R
4
=30Ω.Cường độ dịng điện qua R
4
là 0,5A
Tụ điện có điện dung...
... change.
7. Under no circumstance will Miss Weaver be offered the job.
8. Under no circumstance should you send money to us by post.
9. Under no circumstance can we exchange tickets.
10. On any ... does the company.
XI. Rewrite each sentences so that it contains the word or words in capitals, and so
that the meaning stay the same
1. If Smith were to resign , I might stand a chance of getting ... under any circumstances.
……………………………………………………………………………………
9.We can’t exchange tickets in any circumstances.
……………………………………………………………………………………
10.I won’t go out that way to visit him again on my account!
……………………………………………………………………………………
IV....
... formula________ his students.
55. The English contest organized ________ our teachers is an annual event in my school.
56. The participants must find ________ all the answers in order to go in the next ... the Earth.
12. Courses like shoemaking or glass engraving provide people ________ practical skills
they can do with their hands.
13.She is famous _______ her beautiful face and sweet voice.
14. ... politics.
25. I’m bit short_________ money. Can you lend me some?
26. I was delighted___________ the present you gave me.
27. She was sad because he was very rude_________ her.
28. She was very angry_________...
... change.
7. Under no circumstance will Miss Weaver be offered the job.
8. Under no circumstance should you send money to us by post.
9. Under no circumstance can we exchange tickets.
10. On any ... under any circumstances.
……………………………………………………………………………………
9.We can’t exchange tickets in any circumstances.
……………………………………………………………………………………
10.I won’t go out that way to visit him again on my account!
……………………………………………………………………………………
IV. ... does the company.
XI. Rewrite each sentences so that it contains the word or words in capitals, and so that the meaning stay the
same
1. If Smith were to resign , I might stand a chance of getting...
... §ång ViÖt
Change these sentences into passive voice:
1. They cannot make tea with boiled water.
-> ……………………………………………………………………………….
2. He is not instructing all the workers of the plan at the ... ……………………………………………………………………………….
12.The children did not look at the animals with strange eyes.
-> ……………………………………………………………………………….
13.They have not provided the victim with food and clothing.
-> ……………………………………………………………………………….
14.People ... the papers into different shapes.
-> ……………………………………………………………………………….
49.Weeds do not cover the riverbank.
-> ……………………………………………………………………………….
50.Smoke did not fill the room.
-> ……………………………………………………………………………….
The...
... EXERCISE 1 CHUUYEN SANG CAUBIDONG
1 Someone broke this mirror last night.
………………………………………
2 Someone washes the towels ... very hot countries.
……………………………………………….
5 They pay the office workers weekly.
………………………………………
6 Someone bought all this cheese in France.
………………………………………………
7 Someone found Emily's bike in ... river.
……………………………………………
8 Someone visits most of the prisoners once a week
………………………………………………
9 Someone cleans this car every week.
………………………………………
10 They play a lot of sport on the beach.
…………………………………………...
... 8. I’m going to invite my friends to come over ……………. dinner tonight.
9. Next summer, my family will have a vacation ……………. Thailand and stay there …………….one week.
10. I’m busy just...
... một thanh Al tiếp xúc với 1 thanh Zn trong dung dịch HCl, sẽ quan sát được hiện tượng:
A. Thanh Al tan, bọt khí H
2
thoát ra từ thanh Zn.
B. Thanh Zn tan, bọt khí H
2
thoát ra từ thanh Al.
C. ... thanh cùng tan và bọt khí H
2
thoát ra từ cả 2 thanh.
D. Thanh Al tan trước, bọt khí H
2
thoát ra từ thanh Al.
90. Có 2 chiếc thìa sắt như nhau, một chiếc giữ nguyên còn một chiếc bị vặn cong ... (trừ hidro) và IIA B. IIIA đến VIIIA
C. IB đến VIII B D. Họ lantan và họ actini
61. Cấu hình của nguyên tử hay ion nào dưới đây được bi u diễn không đúng?
A. Cr (Z = 24) [Ar] 3d
5
4s
1
B. Mn
2+
...
... NaH
2
PO
4
C. Na
2
HPO
4
D. Na
3
PO
4
Câu 26: Để phân bi t các dung dịch riêng bi t chứa trong các lọ mất nhãn gồm : NH
4
NO
3
, (NH
4
)
2
CO
3
,
AlCl
3
, BaCl
2
và FeCl
2
bằng một thuốc thử, ... dung dịch AlCl
3.
Câu 22: Hòa tan Fe trong HNO
3
dư thấy sinh ra hỗn hợp khí chứa 0,03 mol NO
2
và 0,02 mol NO (là
sản phẩm khử duy nhất). Khối lượng Fe bị hòa tan bằng: (cho Fe =56).
A. 2,24 ... Chỉ dùng một hoá chất nào sau đây để phân bi t các dung dịch BaCl
2
, Na
2
SO
4
, Na
3
PO
4
, HNO
3
chỉ bằng 2 lần thử:
A. Quì tím B. Dung dịch Na
2
CO
3
C. Dung dịch AgNO
3
D. Dung dịch NaCl
Câu...
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i3!M!l!(I#j!Sa3K!N aN !amACO,!(=
)#JMnoaAp(M(IaaAB!am#f!fQ!qDm!AC
l!aApaq*m(IaAB!A(3!=aS(!l!fr)Usn!
aS(Q!(=#tq
Bài ... ao)vsE(3`</
)baRƒ#f
5<
200 BÀITẬP VẬT LÍ HÓC BÚA VỚI HƯỚNG DẪN VÀ LỜI GIẢI
(200 Puzzling Physics Problems with Hint and solution)
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