Составьте структурные формулы химических в-в:
1) C3H8O2
2) CH3(CH2)nOH
3) C17H34O2
4) CH3(CH2)6COOH
5) (C2H6OSi)n
6) цетеарет-12 и цетеарет-20
7) C6H14O6
8) C8H8O3
9) C15H20O
помогите хоть некоторые
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