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Объяснение:
1
1) гексан С₆H₁₄:
CH₃ - CH₂ - CH₂ - CH₂ - CH₂ - CH₃
2) 2-метилпентан С₆H₁₄:
CH₃
|
CH₃ - CH - CH₂ - CH₂ - CH₃
3) 3,4-диметил-3-этилоктан C₁₂H₂₆:
CH₃ CH₃
| |
CH₃ - CH₂ - C - CH - CH₂ - CH₂ - CH₂ - CH₃
|
C₂H₅
4) 2-метил-3,3,4-триэтилгептан C₁₄H₃₀:
CH₃ C₂H₅ C₂H₅
| | |
CH₃ - CH - C - CH - CH₂ - CH₂ - CH₃
|
C₂H₅
Все четыре вещества являются гомологами, так как относятся к одному и тому же классу углеводородов - алканам. Их общая формула СₓH₂ₓ₊₂.
Первые два вещества - гексан и 2-метилпентан являются изомерами. У них одинаковая молекулярная формула С₆H₁₄, то есть одинкаовое число атомов углерода и водорода. Отличия в структуре: у гексана линейный углеродный скелет, у 2-метилпентана углеродный скелет разветвленный.
Гомологи - 1), 2), 3) и 4)
Изомеры - 1) и 2)
2
1) CH4 = H2+ 3C2H2
2) C2H2 +H2= C2H4
3) C2H4 +Br2= C2H4Br2
3
не поняла вопроса))