уравнение горения фосфора 4р + 5о 2 → 2р 2 о 5 , ∆ н = - 3010 кдж.
укажите массу фосфора, которая сгорела, если выделилось 3,01 кдж теплоты

ответ: 1. there is a big tree in the garden. 2. there is a bank

near here. - where is bank? 3. there is a new

supermarket in the center of our town. 4. there is a hotel

over there. hotel isn't cheap. 5. where is the cat?

cat is on the sofa. 6. where is the book? - book is on the

shelf. 7. where are the flowers? - flowers are in a

beautiful vase. 8. where is the vase? - the vase is on a little table near the window. 9. open the window, please. the weather is fine today. i can see

sun in the sky, i can see a nice little bird. bird is

sitting on a big tree. the tree is green. 10. there is a

little white cloud in the sky. 11. we have a large room.

there is a big sofa in the room and a little lamp on

wall over the sofa. i like to sit on the sofa and read a good book.

объяснение:

думаю так, но всё равно проверь

1.Получение этана из метана происходит в две реакции.
1)СН4+Сl2=CH3Cl+HCl 
2)2CH3Cl+Na=C2H6+NaCl
2.Получение пропана из этана происходит в две реакции.
1)С2Н6 + Cl2 = C2H5Cl + HCl 
2)C2H5Cl + CH3Cl + 2Na = C3H8 + 2NaCl.
3.Получение гексана из пропана происходит в две реакции.
1)С3Н8+Cl2=C3H7Cl+C3H7Cl+2HCl 
2)2C3H7Cl+2Na=C6H14+2NaCl
4.В процессе ароматизации нефтепродуктов и каталитического риформинга гексан дегидроциклизуется в бензол.
C6H14=C6H6 + 4H2
5.Получение нитробензола из бензола(реакция нитрования).
C6H6 + HNO3=C6H5NO2