Cho 1,52 g hỗn hợp hai kim loại ( có hóa trị II ) tác dụng hết với dung dịch H2SO4 loãng, dư thấy có 0,336 lít khí thoát ra ( ở đktc ). Tính khối lượng hỗn hợp muối sunfat khan thu được ( H = 1, S = 32, O = 16)

nãy h mấy bạn ns mình cho đề khó thì mình ko cho đề khó nữa mình sẽ cho đề khó hơn vẽ tom and jery đang dzí nhau ik

Chào mọi người Mik là thành viên mới tham gia hỏi đáp 247 Vẽ cho mik anime,chipi vui nha.

Vẽ cho linh 1 anime nữ đang cười tươi nhé Hnay vui ghê ak :Đ

vẽ hộ chữ king off hoidap247 nha mong ad và mod ko xóa

tìm x,y thuộc Z biết xy+3x+3y=0

1. this sign says " Stop " ...... go straight ahead A. mustn't B. must C.can D. can not 2. What is this ? It í ..... apple A. a B. the C. can D. ko có đáp án D nha các bạn 3. Is this yourr pen ? - ........ A. no,that's a book B. this is my pen C. no,it isn't D. yes it isn't 4. I am ........ brother A. my B.her C.he D.you 5. Where ........ she ........ ? A. do/live B. does/lives C. do/lives D. does/live 6. We / live ........ Phu Quang street ......... Hai Phong city A. on/in B. at/in C. in/in D. to/in 7. How many ............... there in her school A. student-is B. students-are C. students-is D. are-students 8. What ............ names ? - They' re Lan and Mai A. are/their B. is/your C. are/they D. (A) & (B) 9. Who are they ? - They ....... My friends A. be B. is C. am D. are 10. There and .......... students in my school this school year A. nine hundred and ninety-nine B. nine hundreds and ninety-nine C. nine hundred ninety-nine D. ko có đáp án nha Mọi người ơi làm giúp nha , câu nào ko bít thì để lại nha. bạn nào làm đúng và hết mình sẽ cho 5 * và cảm ơm và ctlhn nha giúp nha

Tìm x , biết : a. 151- 2* (x - 6 ) = 2227:17 b. 7 * x - 2 * x = 105 c.18 - x * 6,5 = 22,1 d. x * 1/3 : 2/9 + x : 2/7 = 2 e. x * 3 + 1,32 = 15,33 g. ( 0,9 + x ) * ( 1-0,4 ) = 288

I. Choose the word whose main stress is placed differently from the others in each group. 1. A. realize B. improve C. possible D. comfortable 2. A. important B. especially C. prefer D. influence 3. A. general B. opinion C. abroad D. surprise II. Choose the word whose underlined part is pronounced differently from the others. 4. A. seven B. level C. next D. ruler 5. A. jungle B. sunny C. bus D. surrounding 6. A. guessed B. invited C. decided D. naked B. GRAMMAR I. Choose the correct answer. 7. ……………… I have a look at those shoes in the window, please? A. Must B. Would C. Should D. Could 8. We ……………… pay for the tickets as Josie won them in a competition. A. mustn’t B. didn’t have to C. couldn’t D. hadn’t to 9. You really ……………… make such a mountain out of a molehill! A. can’t B. won’t C. mightn’t D. shouldn’t 10. You won’t ……………… to connect to the Internet once you’ve got broadband as you’re online twenty-four hours a day. A. need B. must C. ought D. able 11. I hope we ……………… find the cinema easily. A. could B. may C. might D. can 12. We couldn’t find a hotel room so we ……………… sleep in the car. It was awful! A. must B. should C. had to D. could 13. We’d love to ……………… afford to go on a round-the-world cruise. A. can B. be able to C. will have to D. have to 14. You’ll ……………… tell the police that your house was broken into. A. have to B. must C. had to D. should V. Write one word in each gap. When I broke my arm a week ago, I guess it (42) …………………………. to have hurt. But it didn’t! We were doing PE at school, and we were making a pyramid. We (43) …………………………. to stand on each other’s shoulders. I was right at the top. We (44) …………………………. have been doing it properly because suddenly the pyramid collapsed and we all fell. I landed on my arm. Mr. Jenkins (45) …………………………. have known immediately that I’d broken my arm because he sent someone to call an ambulance. ‘Sit still, and don’t move your arm at all until the ambulance comes’, he said. I (46) …………………………. still remember the feeling - my arm was numb, and looked very strange, but there was no pain at all. I remember thinking: ‘It (47) …………………………. be broken. If it was broken, I’d be in agony. ‘I suppose not feeling any pain (48) …………………………. have been because I was in shock. The plaster (49) …………………………. come off in about three weeks but it (50) …………………………. have to stay on longer. It depends on whether the break has healed properly or not. The next three weeks may (51) …………………………. be the best three weeks of my life - no basketball, no playing in the playground, no swimming - but I’m counting my blessings. It (52) …………………………. have been a lot worse!

Combine these pairs of sentences with proper relative pronouns or relative adverbs. 1.The house is at the other of the street. You're looking for it. 2.The child is living with his aunt. His parents died in the air crash. 3.The palace used to be the site of an animal market. You were standing there. 4.What's the address of the company? We noticed its advertisement the other day. 5.Did you know the actor? You saw him playing Hamlet. 6.The laboratory is well equipped. My brother works there. 7.The years are unforgettable. I was in the army in those years. 8.The reason isn't explained. He comes here for this reason. 9.The restaurant serves good food with reasonable prices. We often have lunch there. . 13.I`ll never forget the guests.I invited them to my wedding 14.A cousin spilled wine all over my wedding dress. I din’t even know him 15.A trophy is on the shelf.your father won it in high school. 16.A picture is in this box. I drew it seventy years ago. 17.I remember a high school teacher.I liked her very much. 18.Here is a poem. I wrote it in her class. 19,A dog is in the picture. I loved the dog so much. 20.A lot of letters are in this evelope.Your father wrote them in college. 21.Here are some gold coins.My father gave them to me seventy-five years ago. 22.A girl was injured in the accident.She is now in hospital. 23.A man answered the phone.He told me you were away. 24.A waitress served us.She was very impolite and impatient 25.A building was destroyed in the fire.It has now been rebuilt. 26.Some people were arrested.They have now been released. 27.A bus goes to the airport.It runs every half hour. 28.The man is standing at the door. He wants meet our manager. 29.I'll send the book. You need it.