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anhltq.ductrischool
2 năm trước
Trộn lẫn 100ml dd nacl 1.5M với 150ml dd AgNo3 2M thu được dd X và m (g) kết tủa Y. Tìm m, xác định Cm của các chất có trong dd X
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Các câu hỏi liên quan

I. Choose the best answer : 1. My home village is ………….. 40 kilometers north of the capital. a. held b. laid c. located d. surrounded 2. There is a large ……………….. of animals that live in Nairobi National Parks. a. vary b. various c. varied d. variety 3. One species is dependent …………….. another for survival. a. to b. on c. of d. at 4. There are toxic levels of ………….. in the water of this lake. a. chemists b. chemistry c. chemicals d. chemics 5. Tram Chim national park is created to ……. several rare birds, especially the Sarus Crane. a. protect b. train c. hunt d. trade 6. The ……………….. has threatened many of the animals in this park. a. population b. remain c. increase d. contamination 7. We can go the National Park to learn about the different ………….. of animals and plants. a. species b. types c. means d. sorts 8. Our aim is to ...................... better relationship with the other nations. a. produce b. conduct c. establish d. become 9. Everglade National Park is a sub- tropical wilderness in the southeastern United States. a. tropical b. sub - tropical c. temperate d. frigid 10. …………………. means a state of continuing to live or exist. a. park b. survival c. zone d. contamination 11. Cuc Phuong National Park is ……… 160 km South West of Ha Noi. a. lied b. established c. abandoned d. located 12. Nearly 1,000 of the world's bird species are …………… with extinction. a. threatened b. endangered c. protected d. abandoned 13. Tourists go to Cuc Phuong National Park to look …………. the 1,000-year-old tree. a. to b. on c. of d. at 14. If you …………….. us about the bad service, we'd have eaten there. a. didn't tell b. wouldn't have told c. hadn't told d. had told 15. If Alan had come sooner, he ……..…. dinner with us. a. could have eaten b. would being eaten c. was eating d. could eat 16. Mary ……………. a new car if she had had enough money. a. had bought b. would have bought c. would have buyed d. would buy 17. If I ………………… her address, I would have sent her a present. a. had know b. would have known c. had knew d. had known 18. I would have watched the football match on TV if I ……………….. at home last night. a. had stayed b. stayed c. stays d. would have stayed II. Complete the sentences : 1. If the weather (be) ………nice, they would have played football. 2. If we had gone to a good restaurant, we ( have) ………a better dinner. 3. John would have written a good report if he ( learn)…… more words. 4. If the boys (take) ……… the bus to school, they would have arrived on time. 5. If the teacher had explained the homework, I (do)………it. 6. They would have arrested the burglar if the police (come) ……… earlier. 7. If they had waited for another 10 minutes, they (see) ………the pop star. 8. If you (buy) ………fresh green vegetable, your salad would have tasted better. III. Rewrite the sentences : 1. You didn’t play for us, so we didn’t win If ..................................................................... ........................................................................................... 2. She didn’t write more carefully. She made too many mistakes. If .............................................................................................................. ................................................................................................................... 3. The fishermen didn’t have good notes, so they didn’t catch a lot of fish. If................................................................................................................... ..................................................................................................................... 4. She didn’t learn hard, so she got bad mark. If ………………………………………….. 5. She ate four cream cakes. She felt sick. If …………………………………………..

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