M(N):m(оксида)=63,6:100
m(N):m(O)=63,6:36,4
это по массе, а нам надо перейти к количеству n(N):n(O)=63,6/14:36,4/16
4,5:2,275=2:1
N2O
1. c
2. b
3. a
4. d
5. c
6. c
7. d
8. d
9. a
10. d
11. d
12. c
13. c
14. c
15. b
16. d
17. a
18. c
19. a
20. d
My room big,beatiful and cool. I like my room
2. He was in the Theater.
3. She was in the Zoo.
4. They were in the cinema.
5. They were in the cafe.
6. He was in the park.
Had we holiday dinner last Sunday?
We had holiday dinner last Sunday, hadn't we?
When we had holiday dinner?
What we had last Sunday?
We had holiday dinner last Sunday or last Saturday?