1) i2 + Ba(oh)2 -> Bai2 + Ba(iO)2 +H2O                                                                                           2) Br2 + H2S -> S + HBr

узнать где окислительные, где востановительные реакции...и расставить кофицеэнты

Поставьте глагол в нужную форму страдательного залога.

A. 1. You (to advise) to wear sensible shoes in winter. 2. The time before bed (to spend) very pleasantly. 3. Sniffer dogs (to use) by police to detect drugs and explosives. 4. Huge pine trees (to uproot) by the storm. 5. You (not to allow) to buy cigarettes if you are under sixteen. 6. Toyotas (to manufacture) in Japan. 7. This road never (to clean). 8. Gold (to discover) in Eastern Canada. 9. When I saw him, he (to chase) by a large dog. 10. Several towns (to destroy) by the eruption of Vesuvius. 11. This coffee just (to make), help yourself! 12. You ever (to cheat)? You ever (to make a fool of)? 13. The mirror (to break) while it (to move) into the hall. 14. How the word "magazine" (to pronounce)? 15. The table (to lay) now. You (to serve) in a few minutes. 16. For months, the baby kangaroo (to protect), (to feed) and (to teach) to survive by its mother. 17. I feel that I (to watch) now by somebody. 18. These T-shirts (not to iron) yet. 19. Love stories always (to sell) well. 20. Oranges and tangerines are very useful, besides, they (to peel) perfectly. 21. I just (to tell) that my house (to knock down) next month. 22. My sweater (to wash) badly so I put it into the washing-machine.

B. 1. Don't enter the room! A student (to examine) there. 2. The event (to report) by the newspapers before they arrived home. 3. After the accident he immediately (to take) home. 4. The letter (to type) by the typist when I came in. 5. I am sure that his work (to complete) by the end of the month. 6. Some new magazine just (to bring). Would you like to look them through? 7. The exercises usually (to correct) by the teacher at home. 8. I can't show you my written work as it (not to return) by my teacher. 9. Many new houses (to build) in our town lately 10. We think that the ship (to charter) next week. 11. They will pay the money as soon as the goods (to deliver). 12. The goods (not to examine) at the custom house yet. When they (to examine)? 13. The question which (to discuss) now at the conference is very important 14. This bridge (to build) in 1945. 15. The contract (to type) before the director comes to the office. 16. Important scientific work (to carry on) by that institute. 17. All the students (to examine) by 5. 18. The documents (not to sign) by the manager yet. They (to check) now. 19. She (to frighten) by a loud noise in the street