July 2022 1 11 Report

для получения синтетического каучука можно использовать вещество формула которого :

1) СН3-СН2-СН2-СН3 2) СН2=СН-СН2-СН3 3) СН3-СН=СН-СН3 4) СН2=СН-СН=СН2

 

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