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+6 ) ) 1s² 2s² 2p²
2 4
внешний слой: ... 2s² 2p² \ ответ: Б
2) H₂C = CH₂( 5δ и 1π связь) \ ответ: Б
3) СnH2n-6 соответствует аренам \ ответ: Г
4) Следующие признаки: sp3 - гибридизация, длина углерод - углеродной связи 0,154 нм, угол связи 109⁰28’ для алканов, т.е. этану
ответ: Б
5) С₂Н₂ - алкин, в алкинах тройная связь \ ответ: В
6) Понятие «структурная формула» ввёл А. Бутлеров ответ: Б
7) Mr(C₂H₂) = 12*2+1*2 =26
Mr(C₃H₄) = 12*3 +1*4= 40
Mr( C₄H₆) = 12*4+1*6 = 54
Mr(C₅H₈) = 12*5+1*5= 68
ответ: Б
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