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
3 organised
4 improve
6 decorates
7 win
1. Do you know how old he is?
2. You should learn (study) English more
3. I thought you know it
4. Every magazine has something interesting
5. We asked them if (whether) they bought a dictionary
1.the pupils ran a race at the stadium last week
2. their family went to the seaside a month ago.
3.margaret did the shopping yesterday evening.
4.they
listened to music at the concert hall yesterday.
5.my father fixed his
car the other day.
6.fred and helen stayed at a hotel last June.
7.bat watered the flowers an hour ago.
8.we traveled by sea last
summer.
9.sally tried on a white dress at the shop yesterday.
I have a lot of favorite hobbies. I like to read, I like to ride a bike, and I really like the story. But my most important hobby is drawing.
I started painting when I was still young. Mom and Dad very often gave me markers of various colors, colored pencils and beautiful, snow-white paper for drawing. I liked to paint something beautiful on a blank sheet, plants, animals, sometimes people. Therefore, I myself often made postcards for my mother and father.
However, my first drawings were not the best. Something turned out to be crooked, something did not work at all. But I always continued to draw. Now, I think I draw very well. My work hangs on the walls in my room. I often send my creations to the contests of children's drawings and often receive diplomas and prizes.
Moreover, I go to art school. I really like it there. In the art school reigns a real atmosphere of skill and creativity. We usually draw still lifes, sometimes people. In the summer we go to the open air and draw nature, flowers, forests, trees, houses.
Now my drawings are pretty good. But someday I want to learn how to draw as great Russian artists I. Shishkin, I. Aivazovsky and K. Bryullov! I'm sure I can draw even better if I try.
