... lượng hỗn hợp ban đầu là 100g => m Al
2
O
3
= 10,2g ;; => m CaCO
3
= 80g . PTHH :
CaCO
3
CaO + CO
2
Độ giảm khối lượng = 100 – 67 = 33g chính laø
mCO
2
=> nCO
2
= 33 : 44 ... mol
Theo PT : n CaCO
3
phản ứng = nCO
2
= 0,75mol
⇒
m CaCO
3
pö = 75g ; m CaCO
3
dö = 5g =>Chất rắn
gồm : m Al
2
O
3
= 10,2g ; m Fe
2
O
3
= 9,8g ;
m CaCO
3
dö = 5g ; mCaO = 0,75.56 = ... nhiệt độ cao thu được chất rắn có
khối lượng bằng 67% khối lượng hỗn hợp
ban đầu . Tính % khối lượng của các chất
trong chất rắn thu được .
Bài t an khi giải qui về 100
Bài t an khi giải...
... next week.
3. Is a student pilot flying that airplane?
4. Alan’s knowledge about art doesn’t impress me.
5. People throw away billions of cans every year all over the world.
6. D.E. Hughes ... attend first-aid course last year.
16. Farmer can milk cows twice a day.
17. The nurse taught Hoa how to give fist-aid on the phone.
18. When I came, he was repairing the computer
19. We ... Vũ Bá Quyền Bình Giang Hải Dơng onglaido2000@gmail.com
Chuyển các câu sau sang câubị động
1. The waiter refilled my glass.
2. My secretary...
... do not cover the riverbank.
-> ……………………………………………………………………………….
50.Smoke did not fill the room.
-> .
The end.
Chúc các em thành công!
Teacher: Hoàng Văn Huy THCS Đồng Việt
Change these ... ……………………………………………………………………………….
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 ... 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 moment.
-> ……………………………………………………………………………….
3....
... 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...
... 21. David’s going to be given a big surprise.
22. Considerable damage has been caused by the fire.
23. Why was the house built so close to the road?
... Who wrote this article ?
28. Nobody has used this bicycle for many years .
29. You have to give the book back .
30. Mozart wrote more than 600 pieces of music.
31. Farmers cut rice during...
...
//Kiem tra toan le hay toan chan
i=n;
s=kq=0;
//s dung de dem so vong lap, neu kq= so vong lap thi toan chan, bang 0 neu toan le
//, khac chan, khac 0 neu co ca le va chan
while(i!=0) ... n,a[50],giam,tang;
printf("Nhap so phan tu trong mang: ");
scanf("%d",&n);
input(a,n);
dem(a,n,&tang,&giam);
printf(" ;Co % d day tang va %d day giam",tang,giam); ... %5.2f la de 5 khoang trong in x/y, trong do co 2 khoang trong in phan thap phan
getch(); //cho an 1 phim de ket thuc chuong trinh
}
#include <stdio.h>
#include <conio.h>
void...
... They began to plants rubber trees in big plantations.
30. People can continue to enjoy natural resources.
31. People will continue to drink Coca-Cola in the 21
st
century.
32. American people ... there had been a mistake.
11.He has made any mistakes in his composition
12.A man I know told me about it
13. You should clean your room
14. How many language does she speak ?
15. Has Tom finished ... build) on that corner next month
10. The President had his advisors ( arrange) a press conference
Change the following active sentences into passive sentences
1.They can’t make tea with cold water
2....
... has caused a considerable damage.
A) A considerable damage been has caused the fire. B) A considerable damage has caused the fire.
C) A considerable damage has been caused by the fire. D) A considerable ... emergency plans, later abandoned to build new cities.
A) Emergency plans was first drown up and later abandoned to build new cities.
B) Emergency plans were first drown up and later abandoned to ... troops were coming.
112. People think that the earth stood still.
113. We’ll continue to use this computer.
114. They began to plant rubber trees in bug plantations.
115. People can continue...
... A và B đang cao hơn vị trí cân bằng B
lần lượt là 0,5mm và 0,866mm, mặt thoáng ở A đang đi xuống còn ở B đang đi lên. Coi bi n độ
sóng không đổi trên đường truyền sóng. Sóng có :
A. Bi n độ ... A và B đang cao hơn vị trí cân bằng B lần
lượt là 0,5mm và 0,866mm, mặt thoáng ở A đang đi xuống còn ở B đang đi lên. Coi bi n độ sóng
không đổi trên đường truyền sóng. Sóng có :
A. Bi n độ ... 6cos40πt
và u
B
= 8cos(40πt ) (u
A
và u
B
tính bằng mm, t tính bằng s). Bi t tốc độ truyền sóng trên
mặt nước là 40cm/s, coi bi n độ sóng không đổi khi truyền đi. Số điểm dao động với
bi n...