цахиур 2.2

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  • 1.

2. : . 3. , 4. 5. , . . 6. SiO 2 O=Si=O , , . 7. H 2 SiO 4 H2SiO4 HOSi=o HO . . . . 8. -1 9. -2 . 10. 3 11.

  • ,

12. 13. 14. .