Nhiệt độ nóng chảy của bạc là: A. -960 độ C B. 96 độ C C. 60 độ C D. 960 độ C

Choose the best option to complete the following sentences. 1. Jean Fragonard was a French artist ______ portrait of children. a. whose paintings b. who has painted c. who painted d. whose painted 2. Wild animals ______ in their natural habitat will have a better and longer life than those which are kept in protected areas. a. which lives b. to live c. living d. Both a and c 3. She lives in the house ______. a. which has the red door b. who has the red door c. that with the red door d. with its red door 4. The students ______ noise in class will be punished. a. making b. to make c. Both a and d d. who make 5. Completed in 1756, Nassau Hall is the oldest building now ______ on the campus of Princeton University. a. standing b. which stands c. has stood d. Both a and b 6. Neil Armstrong, the first person ______ foot on the moon, reported that the surface was fine and powdery. a. to set b. who setting c. setting d. set 7. The house ______ in 1798 was the most distinguished building in this area at that time. a. completing b. which was completed c. completed d. Both b and c 8. He was the last athlete ______ part in the competition in the morning. a. who takes b. to take c. taking d. Both a and c 9. Our solar system is in a galaxy__ the Milky Way. a. calling b. called c. which is calling d. which called 10. Perhaps solar energy is the best fuel ______ to make electricity. a. is used b. using c. to use d. to be used 11. Dienbienphu _____ by a lot of tourists both at home and abroad is in the North – West of Vietnam. a. which visit b. which is visited c. to be visited d. visiting 12. The man _____ to the policeman has just returned home from Paris. a. talking b. to talk c. who talked d. talked

Phần I,II giúp mik lẹ nha năn nỉ đó

I. Rewrite the following sentences, keeping the meaning unchanged. 1. We didn’t enjoy the trip because of the heavy rain. The heavy rain prevented............................................................  Because …………………………………………………………………………………………………….. 2. Mr. Thanh couldn’t enjoy the meal because of the stomachache. The stomachache prevented..................................................................  Because …………………………………………………………………………………………………….. 3. Lan didn’t go to school yesterday because of her sickness. Because Lan........................................................................................... Lan’s sickness ………………………………………………………………………………………………………. 4. The buses couldn’t run because of the storm. The storm prevented........................................................................... Because …………………………………………………………………………………………………….. 5. Because he was ill, he couldn’t go to school.He couldn’t........................................................................................... His illness …………………………………………………………………………………………………………. 6. I couldn’t listen to the radio because of the noise. The noise prevented...................................................................... Because …………………………………………………………………………………………………….. 7. Her laziness makes her parents sad. Because of ........................................................................................... Because ................................................................................................ 8. The toothache prevented me from liking the party. Because of .................................................................................... Because …………………………………………………………………………………………………….. 9. Mai didn’t enjoy the music because of the stereo.The stereo prevented...................................................................... Because …………………………………………………………………………………………………….. 10. My father couldn’t enjoy the breakfast because of the headache. The headache prevented.................................................................. Because …………………………………………………………………………………………………….. 11. Mary didn’t go to school yesterday because of her illness. Because Mary........................................................................................... Mary’s illness ……………………………………………………………………………………………………. 12. They couldn’t go to school because of the rain.The rain prevented............................................................................ Because …………………………………………………………………………………………………….. 13. Because he was tired, he couldn’t finish the work. He couldn’t.................................................................................. His tiredness ……………………………………………………………………………………………………… 14. I couldn’t study because of the darkness. The darkness prevented.............................................................................. Because …………………………………………………………………………………………………….. 15. His bad marks make his parents unhappy. Because of ........................................................................................... Because ................................................................................................ 16. The stomachache prevented me from enjoying the meal. I didn’t ..................................................................................................  Because ……………………………………………………………………………………………………..

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Làm giúp mình với mình cần gấp Trả công hậu hĩnh

Bài 2: Người ta đốt sắt trong bình chứa oxi thì thu được oxit sắt từ (Fe3O4). a. Nếu thu được 23,2g oxit sắt từ thì phải dùng bao nhiêu g sắt? b. Tính khối lượng KMnO4 cần dùng để điều chế thể tích oxi nói trên. Biết thể tích khí đo ở đktc. Bài 3: Cho 9.6g CuO tác dụng với khí hidro khi đun nóng. a. Tính số g đồng điều chế được? b. Tính thể tích H2 (đktc) cần dung cho phản ứng trên? Bài 4: Cho 0,65g Zn tác dụng với 7,3g HCl. a. Chất nào còn dư sau phản ứng, khối lượng là bao nhiêu? b. Tính thể tích H2 thu được ở đktc? Bài 5: Cho 8,3g hỗn hợp kim loại Fe và Al tác dụng với dung dịch HCl dư thu được 5,6 lít khí ở đktc. a. Viết PTHH của các phản ứng xảy ra. b. Tính % khối lượng mỗi kim loại trong hỗn hợp.

Bài 1: Hoàn thành các phương trình phản ứng sau, cho biết chúng thuộc loại phản ứng nào? 1. P + O2  P2O5 2. Fe + O2  Fe3O4 3. KClO3  KCl + O2 4. KMnO4  K2MnO4 + MnO2 + O2 5. Zn + HCl  ZnCl2 + H2 6. Al + H2SO4  Al2(SO4)3 + H2 7. H2O  H2 + O2 8. H2 + O2  H2O 9. P2O5 + H2O  H3PO4 10. CaO + H2O  Ca(OH)2 11. Na + H2O  NaOH + H2 12. Al + O2  Al2O3 13. H2 + CuO  Cu + H2O 14. H2 + Fe3O4  Fe + H2O

Ai giúp mình câu 2 với mình cảm ơn

Giíp em làm câu 3 với ạ Em cảm ơn