Hoà tan hoàn toàn 11,7 gam NaCl và 18,9 gam Na2SO3 vào nước được 200g dung dịch A chứa hỗn hợp 2 muối trên. Cho 200g dd A tác dụng vừa đủ với 150 gam dung dịch HCl thu được dung dịch X và khí Y. Tính thể tích khí Y ở đktc và tính nồng độ phần trăm chất có trong dung dịch X

Giúp mình bài này vs

REWRITE THESE Wh- QUESTION IN REPORTED SPEECH

1. "Where does your father work ?" The teacher asked me

-> The teacher ...............................................................................

2. "How far is it from HCM city to Vung Tau ?" A tourist asked

-> A tourist....................................................................................

3. "How long will you stay in England?" Tam's friend asked him

->Tam's friend..............................................................................

4. "How many people are there in your family?" She asked Lan

->She asked..................................................................................

5. "What's your hobby?" The teacher asked Lien

-> The teacher .............................................................................

6. "Why do you collect waste paper?" She asked Ba

-> She..........................................................................................

7. "When will you visit Hanoi?" Hoa asked her parents

-> Hoa.........................................................................................

8. "What language do you speak?" Mrs Brown asked Thu

-> Mrs Brown.............................................................................

9. "What time do schools begin?" He asked Mrs Brown

-> He ...........................................................................................

10. "How do you go to the airport?" His friend asked him

-> His friend................................................................................

11. "Where do you learn English?" She asked Lan

-> She..........................................................................................

12. "What do they save paper for?" Lien asked Ba

-> Lien ........................................................................................

GIÚP MÌNH 2 BÀI NÀY VS NHA MÌNH ĐAG CẦN GẤP ><

1/Trộn 50ml dd Ba(OH)2 0,05M với 150ml dd HCl 0,1M thì được 200ml ddA. Tính cM các chất có trong dung dịch A

2/Để trung hòa 200ml hỗn hợp NaOH aM và KOH bM cần vừa đủ 100g dung dịch H2SO4 19,6% thu được dung dịch A. Cô cạn ddA thu được 33,2g hỗn hợp 2 muối. Tính a và b

Cho tam giác ABC vuông tại A, đường cao AH, biết AB=9cm Ac=12cm

a) Giải tam giác ABC

b) Tính AH

c) Gọi E và F là hình chiếu của H trên AB và AC. C/m AE.AB=AF.AC

d) Tính diện tích tứ giác BEFC (góc làm tròn đến độ,độ dài làm tròn đến chữ số thập phân số 3)

Giúp mình mấy bài này vs nha ,mình đang cần gấp

I.SUPPLY THE CORRECT FORM OF THE WORDS IN BRACKETS TO COMPLETE THE SENTENCES

1.We .............. gathered everything and ran to the bus stop (hurry)

2. If your son ( not learn ) ................... the lessons carefully, he may fail in the next exam

3. If you want to ........... your English, we can help you (improvement)

4. This book is not ................... (avail)

5. Daisy ................. in Japan for five months now. She enjoys her stay there very much (be)

6. Receiving many letters every day ................ her happy (make)

8. This exercise must .......... by the teacher (correct)

9. Thu and her friend ................ their work yet (not finish)

10. I used to............... in this river when I was young (swim)

11. The teacher asked the students ................ in class (not talk)

12. We ................. TV when the light went out (watch)

II. A/ Supply the correct tense of the verbs in parenthese to complete the sentences: take, not/hear, move, not/see

1. I ......................... to live here three months ago.

2. They ........................ from their old form teacher for ages.

4. It was dishonest of Pamela ...................... those things from the shop without paying.

B/ Put the verbs in brackets into the correct form: perform, have, smoke, break

1. Last year, I used ....................... 20 cigarettes a day

2.I ........................ these shoes since my eighteenth birthday

3. Why ....................... your bicycle ....................... yesterday ?

4. Christmas songs ......................... for people in town yesterday.

III. SUPPLY THE CORRECT FORM OF THE WORDS IN PARENTHESE TO COMPLETE THE SENTENCES

1. It rained ........... in this region for three days (heavy)

2. The most .................. earthquake in Japanese history killed about 150,000 people (disaster)

3.This design offers considerable savings in fuel .......... (efficient)

4. You can greatly ..................... your electricity bills by using energy-saving bulbs (reduction)

5. She was ........................ tired after the journey (extreme)

6. The group called " Friends of the Earth " is concerned about the conservation of the .................. environment (nature)

7. Many household ................. are expensive to buy (apply)

8. I don't like wearing .............. jeans (embroider)

9. He drives ..................., so he often causes accidents (care)

Giúp mình mấy bài này vs nha ,mình đang cần gấp

I.SUPPLY THE CORRECT FORM OF THE WORDS IN BRACKETS TO COMPLETE THE SENTENCES

1.We .............. gathered everything and ran to the bus stop (hurry)

2. If your son ( not learn ) ................... the lessons carefully, he may fail in the next exam

3. If you want to ........... your English, we can help you (improvement)

4. This book is not ................... (avail)

5. Daisy ................. in Japan for five months now. She enjoys her stay there very much (be)

6. Receiving many letters every day ................ her happy (make)

7. Last year, he used ............. 20 cigarettes a day (smoke)

8. This exercise must .......... by the teacher (correct)

9. Thu and her friend ................ their work yet (not finish)

10. I used to............... in this river when I was young (swim)

11. The teacher asked the students ................ in class (not talk)

12. We ................. TV when the light went out (watch)

II. A/ Supply the correct tense of the verbs in parenthese to complete the sentences: take, not/hear, move, not/see

1. I ......................... to live here three months ago.

2. They ........................ from their old form teacher for ages.

3. I ......................... a film at the cinema for years

4. It was dishonest of Pamela ...................... those things from the shop without paying.

B/ Put the verbs in brackets into the correct form: perform, have, smoke, break

1. Last year, I used ....................... 20 cigarettes a day

2.I ........................ these shoes since my eighteenth birthday

3. Why ....................... your bicycle ....................... yesterday ?

4. Christmas songs ......................... for people in town yesterday.

III. SUPPLY THE CORRECT FORM OF THE WORDS IN PARENTHESE TO COMPLETE THE SENTENCES

1. It rained ........... in this region for three days (heavy)

2. The most .................. earthquake in Japanese history killed about 150,000 people (disaster)

3.This design offers considerable savings in fuel .......... (efficient)

4. You can greatly ..................... your electricity bills by using energy-saving bulbs (reduction)

5. She was ........................ tired after the journey (extreme)

6. The group called " Friends of the Earth " is concerned about the conservation of the .................. environment (nature)

7. Many household ................. are expensive to buy (apply)

8. I don't like wearing .............. jeans (embroider)

9. He drives ..................., so he often causes accidents (care)

Cho 5,4g nhôm tác dụng vừa đủ với 600ml dung dịch HCl nồng độ aM tạo ra dung dịch A và khí B

a/ Tính nồng độ aM của dung dịch HCl và thể tích khí B sinh ra (đktc)

b/ Tính nồng độ mol của chất trong dung dịch A (coi như thể tích dung dịch không đổi)

Giúp mình vs nha 😊REWRITE EACH SENTENCE SO THAT THE NEW SENTENCE HAS A SIMILAR MEANING TO THE ORIGINAL ONE, USING THE WORD IN BRACKETS.

1. You should use a dictionary to check the meaning of the new words. (LOOK)

2. The doctor told my father to stop smoking (GIVE)

3. The cost of living has been increasing considerably in the past few weeks. (UP)

4. Margaret Thatcher was born and spent her childhood in the town of Grantham, Lincolnshire, England. (GREW)

5.His business is going badly - he'll have to stop doing it soon. (CLOSE)

6. My aunt has got two teenage children, but they don't seem to have a good relationship with each other. (GET)

7. This exhibition is much more interesting than the last one

The last exhibition was not___________________________

8. The teacher says that no student in the school is noisier than i am

The teacher say that i'm_______________________

9. This book is the least interesting I've ever read

I have never_________________

10. i think Vung Tau City is the most 'liveable' city in VN

I think there is no____________

Giải các phương trình sau:

a) 2 + x − 5 4 = 4 x − 1 6 ;

b) 3 x − 11 − 2 x + 11 = 2018 ;  

c) 2 x − 5 = 7 − x ;

d)  2 x 2 − 1 x 3 + 1 + 1 x + 1 = 2 x 1 − x 2 − x x 2 − x + 1 .