подберите факторы изменяя которые можно добиться увеличения выхода амиака в реакции его синтеза из простых веществ:

N2(г.)+3H(г.)=2NH(г.)

choose the correct preposition circle it example

1. In the evening  my grandfather likes to sit  near / about / at the fireplace

5. What do you usually do in / on / during/ during your science lessons ?

6. Will you go abroad at / on / in October ?

7. My best pen friend is from / out of / in Britain.