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16 tháng 11 2021

d)  2ZN + 4AgNO3 -> 2ZN(NO3)2  + 4Ag

16 tháng 11 2021

e)  2FeCl + 3Ca(OH)2 -> 2Fe(OH)+ 3CaCl2

20 tháng 1 2022

hyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyydjyh

16 tháng 11 2021

1, phải có ánh sáng

2, 6 CO2+ 6 H2O+ năng lựơng ánh sáng mặt trời -> C6H12O6 + 6 O2.

3, phản ứng có lợi tại vì nó tạo ra đường, một chất dinh dưỡng (mik ko tìm tháy thêm lý do)

4, chăm sóc cây thật tốt, trồng cây chỗ có nhiều ánh sáng

HT

1. Today, subjects like music and arts are put into the school ______________inViet Nam. A. so B. too C. either D. however 2. My cousin – Hoa, is the same age me. A. as B. of C. to D. like 3. For many people, a good knowledge of music and arts is regarded as a  for every student. A. need B. needs C. necessity D. necessary 4. This year’s musical festival is not it was last year. A. worse B. as good as C. as well as D. different from 5. Since the 1970s, the festival in Glastonbury has taken...
Đọc tiếp

1. Today, subjects like music and arts are put into the school ______________in

Viet Nam.

 

A. so B. too C. either D. however

 

2. My cousin – Hoa, is the same age me.

 

A. as B. of C. to D. like

 

3. For many people, a good knowledge of music and arts is regarded as a

  for every student.

 

A. need B. needs C. necessity D. necessary

 

4. This year’s musical festival is not it was last year.

 

A. worse B. as good as C. as well as D. different from

 

5. Since the 1970s, the festival in Glastonbury has taken almost every year and has grown in size.

 

A. time B. place C. note D. notice

 

6. The puppet shows present themes of Vietnamese villages.

 

A. city B. country C. rural D. urban

 

7. The brit school is the most famous arts school in Britain.

 

A. perform B. performed C. performing D. performance

 

8. The villagers are they were years ago. There is no change at all.

 

A. as friendly as C. different from

 

B. as friend as D. not as friendly as

 

9. Dong ho paintings are made on _________paper with beautiful___   colours.

 

A. tradition – nature C. traditional – nature

 

B. tradition – natural D. traditional – natural

 

10. My village is not it was ten years ago.

 

A. same as B. the same C. the same as D. the same like

 

11. Teenagers in Viet Nam like k- pop, and they like Korean films .

 

A. so B. too C. either D. however

 

12. Water puppetry in the 11th  century in the villages of red river delta of north Viet Nam.

 

A. begin B. start C. formed D. originated

 

  13. My brother’s taste in art is quite different mine.

 

A. to B. as C. from D. then

 

14. The group is for their albums and tours around the world.

 

A. well-prepared C. well-know

 

B. well-known D. know-how

 

15. The film is not long as the film I watched last week.

 

A. but B. as C. to D. from

 

16. You can see many interesting in that art gallery.

 

A. paper B. portraits C. colours D. paints

 

17. I never watch ballet, and my sister doesn’t .

 

A. so B. too C. either D. like that

 

18. Classical music is not as pop music.

 

A. exciting B. as exciting C. as excited D. more excited

 

19. Arts are of great in education, especially for young children.

 

A. important B. importance C. unimportant D. unimportance

 

20. The performances of puppetry show in the countryside and

 

A. everyday life – folk tales C. everyday life – folk stories

 

B. everyday life – folk rock D. everyday lives – folk people

1
15 tháng 11 2021

 4Al+3O2→2Al2O3

uwu 

15 tháng 11 2021

B nha bn 

HT~

15 tháng 11 2021

đáp án

=N*

15 tháng 11 2021
1000nhé bạn lớp 8 ạ
15 tháng 11 2021

cây dừa.C

17 tháng 11 2021

Ta có:

\(2p+n=28\)

\(2p+10=28\)

\(\rightarrow p=\frac{28-10}{2}\)

\(\rightarrow p=9\)

Vậy \(p=e=9\)

Vì: proton = 9 nên đây là nguyên tố Flo

Mà cấu tạo của lớp e gồm hai lớp:

- Lớp đầu tiên có 2e

- Lớp thứ hai có 7e

18 tháng 11 2021

cảm ơn nha!!!