đốt cháy 3,36 lít khí C4H10 cần dùng vừa đủ V lít O2, sau phản ứng thu được , V lít CO2 đktc và khối lượng g H2O a) Viết PTHH b) Tính V , m c) Tính mKMnO4 cần dùng đủ lượng O2 cho phản ứng trên . Biết phản ứng phân hủy HMnO4 xảy ra theo sơ đồ KMnO4->K2MnO4+O2 và H phản ứng đạt 80%

Put the verbs in brackets into the correct tense.

1. Listen! My mother (sing)________________________a song.

2. Every night, we (go)________________________to bed at 10p.m.

3. Giang (like)_______________music but I (like)____________________Math.

4. Now, they (stay)___________________________in Hue.

5. My father (read)__________________________a newspaper in the morning.

6. Look! Ha (run)______________________.

7. James and his brother (play)_________soccer at the moment. They (play) ___________ it every afternoon.

8. Where (be)_____________________ your father?

- He (be)________ living room. He (watch) ______TV.

9.____________they ____________ (go) to school by bus today?

10. There (be)___________many flowers in our garden.

11. Everyday, Mr.Hung (not go)_______________________to work by car.

12. In the autumn, I rarely (go)_______ sailing and (go)________ to school.

13. I (write)_____________________ a letter to my friend now.

14. At 12 a.m every day, I (have)_______ lunch and (go)________ to bed.

15. On Monday, I (have)____________ math and Art.

16. Where________________the old man (live)___________now?

17. At the moment, I (eat)_______an orange and My sisters (Play) ___Tennis.

26. My brother (do)_________his homework in his room now. He does it every day.

19. Phong, An, Ha, Lan (be)__________________ close friends.

20.___________your mother (walk)_________to market?

21. It (be)__________10.00. We (learn)___________________our lesson.

22. What___________you (do)____________now?

23.__________your mother (walk) to work every day?

24. They (not play)________________soccer in the morning.

25. ____________Hai (work)____________in the garden at the moment?

Mr. Nam is an English teacher. He is forty-five years old. Every morning he gets up at five o’clock. First, he brushes his teeth, washes his face, gets dressed neatly, has breakfast and then he goes to work at six o’clock. He arrives at school at 6.45. He works from seven o’clock till eleven o’clock. After work, he goes home and has lunch at a quarter to twelve.

73. What does he do?

…………………………………………………………….

74. What time does he get up?

…………………………………………………………….

75. What time does he have lunch?

Choose the word (a, b, c, or d) that best fits each of the blank spaces.

My close friend is Minh. He (68)______ eleven years old. He is a student in the same class as mine. He is in grade six. He lives (69)______ the country. There (70)______ four people in his family. It’s Sunday today, so he is not (71)______ now. He is (72)______ soccer with some friends in the park.

68. A. is B. ’s C. are D. A&B

69. A. on B. in C. at D. from

70. A. is B. ’re C. are D. B&C

71. A. study B. studying C. studies D. to study

72. A. playing B. play C. plays D. to play

Choose the word or phrase that best completes each unfinished sentence below.

43. Look! He is _________in front of the bakery.

A. waiting B. wait C. to wait D. B&C

44. Nam and Minh _________playing soccer in the yard at the moment.

A. do B. is C. are D. does

45. What time does Nga _________every morning?

A. gets up B. get up C. get D. gets

46. He _________breakfast at six o’clock every morning.

A. have B. having C. has D. to have

47. Our classroom is _________the second floor.

A. from B. in C. at D. on

48. How many chairs _________there in the house?

A. do B. is C. are D. does

49. -_________does Mai live? –At 120 Nguyen Trai Street.

A. What B. When C. Where D. Who

50. _________do you have history? – On Tuesday.

A. What B. When C. Where D. Who

51. There is a book _________the table.

A. between B. to C. at D. on

52. There are four rooms _________the house.

A. on B. in C. to D. at

53. Mai _________dressed at six thirty every morning.

A. does B. brushes C. gets D. lives

54. Minh goes to school_________12.45 every afternoon.

A. in B. at C. on D. to

55. My father is an_________.

A. teacher B. doctor C. farmer D. engineer

56. _________is your brother? - He is thirteen.

A. What time B. How far C. How old D. How long

57. My teacher lives _________a big city.

A. in B. on C. at D. to

58. This is Lan. _________house is new.

A. My B. Your C. Her D. His

59. Are there _________trees behind her house?

A. some B. the C. any D. many

60. In front of the house _________a park.

A. there is B. that is C. there’s D. A&C

61. _________ is near your school?

A. Which B. What C. Where D. How

62. Look! – There _________a rice paddy.

A. is B. ’s C. are D. A&B

63. A doctor works in a _________.

A. hospital B. museum C. factory D. bookstore

64. It's _________big hotel.

A. that B. a C. the D. an

Cho hình thang ABCD (AB // CD). Gọi E, F lần lượt là trung điểm của AD và BC. Phân giác của góc A và góc B cắt E, F theo thứ tự ở I và K. Chứng minh:
a) Δ AIE và Δ BKF là Δ cân
b) Δ AID và Δ BKC là các Δ vuông 
c) IE = ½ AD và KF=½ BC

Nhiệt phân 15.8 (g) KMnO₄ ​1 thời gian thu được 14.52 (g) chất rắn và V (l) O₂ ( đktc)

a) Tính V

b, KMnO₄ có phản ứng hết không, vì sao?

làm cả 2 câu bằng 2 cách giúp mik với ạ !!!