Ответы на вопрос:
1. ch2=ch-ch2-ch3 2. ch3-ch=ch-ch2-ch3 3. ch3 - c=ch-ch3 | ch3 4. ch2=c-ch2-ch3 | ch3 5. ch3-ch2-c=ch-ch2-ch3 | ch3 6. ch3-ch=c-ch2-ch2-ch2-ch3 | c2h5 7. ch3 | ch2=ch-c-ch2-ch3 | ch3 8. ch3 | ch3-c=c-ch-ch3 | | ch3 ch3 9. c2h5 | ch2=ch-ch-ch-ch2-ch3 | ch3 10. ch3-ch2-ch=ch-ch-ch2-ch3 | ch3 11. cl cl \ / c=c / \ h h 12. h3c h \ / c=c / \ h ch3
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