Câu 2 (3 điểm): Làm thế nào để biết trong Cao có lẫn Mg0? Câu 3 (4 điểm): Cho 3, 2 gam Cuo tác dụng vừa đủ với dung dịch H2SO4 4,9%. Tính nồng độ % của dung dịch CuSO4 (Cu = 64, H = 1, S = 32,0 = 16).

bài 1 tính tổng dãy số cách đều sau a) D = 1+2+3+.....+47+48+49 b) E = 5 + 10 + 15 + ..... + 185 + 190 + 195

giup em 2 bai nay voi a em cam on

Mình sẽ vote 5 sao giúp mình với ạ

Ex1: Hãy chuyển các câu sau sang dạng câu diễn đạt "Wish". 1. I can't go home on time to have dinner with my family. 2. I don't have spare time to read the rest of the book. 3. He can't swim. 4. You always write carelessly. 5. The teacher won't explain the lesson to you again tomorrow. 6. We can't buy this house because of its high price. 7. I'm sorry. I won't be there at 8:00 A.M. 8. They won't offer to help me paint the wall. 9. It is very cold. According to radio, it won't be warmer tomorrow. 10. She doesn't pay attention to what I am saying. 11. I think it won't be bright tomorrow. 12. She can't travel by air. 13. He won't give you a chance to work at the company. 14. We can't write to him because we don't have any time. 15. They can't be here tomorrow morning. Mọi người giúp mình với ạ

Vẽ sabo Chibi ( k mạng ,kèm theo chữ kí trong hình.Hết)

41. If you…………Tom, tell him I have a message for him. a. will meet b. would meet c. meet d. met 42. If you …………too hot during the night, turn down the central heating. a. will feel b. felt c. feel d. feels. 43. If you …………with your dictionary, I’d like to borrow it. a. finish b. finished c. will finish d. are finishing. 44. If I lived nearer the centre, I …………always late. a. wouldn’t be b. can be c. won’t be d. will be. 45. What would Lan do if she …………..the Miss world. a. would be b. were c. will be d. is. 46. If I ………….her, I would have said “hello” a. has seen b. have seen c. saw d. had seen. 47. If she had read the passage more slowly, the candidate……………………. a. understood. B. would have understood c. will understood d. would understand. 48. If it……………, they will not go out. a. rains b. rained c. rain d. raining. 49. Jame will not complete the work if she is …………..rarely enough. a. tell b. telling c. tells d. told. 50. Betty will not go to the party unless John ……………….too. a. go b. went c. going d. goes 51. Ms. An does not want to go on the trip if nobody…………..with her. a. go b. goes c. went d. going. 52. If you ………….to go shopping, please go with your aunt this weekend. a. wants b. want c. wanting d. wanted. 53. Mr. Smith has to work on weekends if his manager………….him to. a. tell b. telling c. told d. tells. 54. Unless they ……………her to work hard, she would not. a. encourage b. encourage c. encourages d. encouraging. 55. If I ……….a king, I would give money to the poor. a. is b. are c. am d. were. 56. If we had left this country, we would have………….to Australia. a. emigrated b. emigrates c. emigrate d. emigrating. 57. If I had to the party last night, I …………her. a. will have met. b. would meet c. would have met d. will meet. 58. Unless the pupils pay attention, the teacher …………….be angry. a. would b. may c. will d. might. 59. Please do not go out if it………………. a. rain b. rains c. rained d. raining. 60. If you ……………me with this exercise, I will do the same for you one day. a. helped b. would help c. help d. will help. 61. If you listen to music, you can’t ……………your study. a. concentrate on b. interested in c. care about d. read about. 62. ……………you study harder, you won’t pass the final exam. a. unless b. if c. if not d. without.

Giúp mik vs. Mik sắp nộp r😭😭😭😭.Giúp mik iu. Xin cảm ơn nhiều nhé (bài 5 là tìm từ Hán Việt và cho bt các từ Hán Việt tạo sắc thái gì cho bài thơ).Mik sẽ vote 5* và chọn ctlhn nha. Giúp iu. Xin cảm ơn

Cho xÔy và yÔz là hai góc kề bù, biết góc xÔy=65⁰. Tính số đo góc yÔz? Vẽ hình giúp mình với ạ!

I.Viết lại câu ko thay đổi nghĩa: 1) We began eating when it stard to rain =>We have....? 2) I last had my hair cut when I left her =>I haven't....? II.Đặt động từ trong ngoặc ở Quá Khứ Đơn hoặc Quá Khứ Hoàn Thành: 1) She said that she ( already, see )..........Dr. Rice 2) When he came to the stadium, the match ( already/begin ) 3) What ( be )..........he when he ( be )..........young? 4) No sooner ( have ).........I (watch)..........TV than the phone (ring)......... 5) I couldn't attend the evening class because I worked at night. =>If I ( not work )...........at night, I ( attend ).........the evening class. 6) I didn't have a laptop so I wish I ( have )........a laptop 7) You didn't stay home. I would rather you ( stay ).......home III.Đặt động từ trong ngoặc ở Quá Khứ Đơn, Quá Khứ Hoàn Thành hoặc Hiện Tại Hoàn Thành: 1) I suddenly ( remember )............that I...........( forget ) my keys 2) Bill no longer has his car. He ( sell ).......it 3) ( Have/you/put )...........of the fire before you ( go ).........out? 4) I was very pleased to see Mary again. I ( not see )..........for a long time 5) She said it ( be ).........the first time she ( meet )..........such a man IV.Viết lại câu nhưng vẫn đúng nghĩa: 1) David went home before we arrived =>When we................... =>After.......................... 2) We had snack than we had a look around the shops =>After.............. 3) The light failed the moment they began work =>They had no sooner................ =>No sooner................ =>Hardly............... 4) We had never been so happy before =>We were............. 5) I went to the zoo last year and that was where I saw a real tiger for the first time =>Before............... 6) I like you didn't go to the party yesterday =>I'd rather you.............. 7) The man was poor so he cuoldn't afford accommodation =>If........... 8) My teacher gave me a lot of homework =>I wish............... 9) He didn't obey with his parents =>I'd rather he.............. 10) She didn't take that job in the city because his home was very far from there =>If his home..................