Đốt cháy 6,5g Zn trong bình đựng 3,36 lit khí oxi (đktc). a/ Cho biết chất nào dư? Dư bao nhiêu gam? b/ Tính khối lượng của chất sản phẩm? c/ Cho toàn bộ lượng chất sản phẩm phản ứng với axit HCl ( vừa đủ). Tính khối lượng của HCl cần dùng?

Tìm x,y biết : x phần 24=y nhân 20 và x trừ y =âm 40

1. If he ______ my husband, I ______ very proud for that. A. was/feeled B. was/ will feel C. were/would feel D. were/ will feel 2. If you ______ hard speaking English every day, you ______ master it quickly. A. practiced/ would B. practice/will C. had practiced/would D. practiced/ will 3. He ______feel very happy if you ______ to see his show tonight. A. would/ came B. won’t/come C. will/come D. wouldn’t/came 4. If the weather ______ not too cold, we ______ go out sightseeing. A. is/will B. has been/will C. being/would D. was/would 5. If John ______ to harass her, she ______ report this to her manager. A. continues/will B. continued/would C. had continued/would have D. continues/ would 6. You ______ never have true love if you ______ to rob it from others. A. would/ want B. will/want C. will/wanted D. would/ wanted 7. If he ______ to other people’s opinions, he ______ everything so badly. A. had listened/wouldn’t have caused B. listened/wouldn’t cause C. listens/ won’t cause D. had listened/wouldn’t cause 8. If I ______ you, I ______ his request immediately. A. had been/ would have accepted B. am/will accept C. were/would accept D. were/ would have accepted 9. You ______ feel such pain if you ______ experience it. A. will/do B. won’t/ don’t C. wouldn’t/didn’t D. wouldn’t/don’t 10. You ______ feel happy every day if you ______ how to give love to everyone around you. A. will/ know B. would/knew C. won’t/know D. wouldn’t/ knew

một bạn học sinh đi học từ nhà đến trường với vận tốc trung bình 4 km/h. Sau khi đi được 2/3 quãng đường bạn ấy đã tăng vận tốc lên 5 km/h. Tính quãng đường từ nhà đến trường của bạn học sinh đó, biết rằng thời gian bạn ấy đi từ nhà đến trường là 28 phút.

1. She cannot cook because she feels very tired today. __________________________________________________________ 2. He was so timid in love, so he lost her. __________________________________________________________ 3. Jane helps me survey the market, so I plan to share a commission with her. __________________________________________________________ 4. You cannot understand me because you are a rich man. __________________________________________________________ 5. Tim drinks too much alcohol every day, that’s why he is hospitalized for treatment __________________________________________________________ 6. Kate likes K-pop music, so she spends the money to buy tickets for the concert. __________________________________________________________ 7. He has many beloved girls, that’s why he becomes so arrogant. __________________________________________________________ 8. My health improves better because I exercise daily. __________________________________________________________ 9. I didn’t eat dinner with everyone, so I feel very hungry now. __________________________________________________________ 10. He got fired because he was too lazy. __________________________________________________________ 11. Stay away from this place or I’ll report the area’s security. __________________________________________________________ 12. You always complain about everything that happens in your life, that’s why I never want to work in a team with you. __________________________________________________________ 13. Follow the instructions or you will ruin everything. __________________________________________________________ 14. People will not go camping in this stormy weather. __________________________________________________________ 15. I love art, that’s why I organized this exhibition. __________________________________________________________

Em hiểu như nào về câu sống theo bản năng sinh tồn đơn thuần

In the future, people will be able to play virtual _____________________games using some smart glasses. ( real)

1. If I meet him, I (tell)______ him to come see you immediately 2. If Julia (repair) ______this old computer, he (use) ______it for another two years. 3. If I were you, I (go)______ to that seminar for more expertise. 4. You (do)______ everything more perfectly if you listen to what I say. 5. If he (win) _______ the contest this time, he (be)______ very rich… 6. If she (work)______ lazily, she would be fired. 7. If Jenny (have)______ more time, she will complete the entry very much better. 8. If it (rain)______ heavily, everyone has to postpone flight to Tokyo. 9. If I (know)______ that you felt tired, I (come) ______ to drive you. 10. If Jack (clean) ______ his house clean, he will be rewarded with candy from his mother. 11. If I (have)______ a wish, I would wish I had lots of money. 12. If he (love)______ me, he (do) _______ anything to conquer me. 13. If I see where your watch is, I (notify)______ you immediately. 14. If she (win) ______ that test, she (have)______ a good car. 15. If I (agree)______ to go to the party last night, I (meet) _______ my former boss. 16. I (prepare) ______ everything perfect for the party if you (pay) ______ me high rent. 17. My family (go) _______ to the resort if the weather hadn’t been so bad today. 18. If you (give) _______ me a reasonable discount, I (buy) ______ these goods in bulk. 19. Lisa (feel) ______ very happy if her boyfriend (show) ______ up suddenly at the party. 20. If you (send) _______ an invitation to them, they would not come to this party. 21. If John (speak) ______Chinese well, he (have) ______ the opportunity to attend a meeting with the Chinese partner. 22. He would never have known this secret if his mother (not reveal) ______ it so soon. 23. Rose will be left behind in her travels if she (continue) ______to rest like this. 24. If you (lend) ______ me money, I’ll buy a new phone for work. 25. You will be honored to contribute to the completion of this project if you (put) ______ effort into it. 26. Mary (visit) ______ her hometown in March if she (not have) ______ any unexpected work. 27. If I (be) ______ you, I (not accept) ______ becoming his subordinate. 28. If you (not help) ______ me with this project, I (not be) ______ able to finish it so well. 29. He will be fined if he (continue) ______ to answer the phone while driving. 30. You (feel) ______more excited if you (join) ______ this concert.

Một người dự định đi hết quãng đường Ab dài 30km trong một thời gian nhất định sau khi đi được nửa quãng đường Ab , ng này nghỉ 30 phút vì vậy để đến được b kịp thời gian quy định người đó phải tăng vận tốc thêm 5km/h trên quãng đường còn lại. tính thời gian dự định Đi hết quãng đường Ab của người đó

Gọi S là tập hợp tất cả các giá trị nguyên của tham số m để tam thức f (x)=(m^2+2)x^2+ 2 (m+4)x +3 đổi dấu.số phần tử của tập hợp S là