Назвати вуглеводні:
ch2– ch2– chch = ch-ch3
ch3ch3
ch=ch-ch=ch- c-ch,
| | |
ch3ch3ch3
ch3-ch2-ch-c = ch-ch2 - ch3
c2h3 ch3​

ник5029    2   26.11.2019 11:32    0