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Izomerizarea pentanului necesită:

17d2388c760ed9987eb16b470b0c907f

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Prezintă izomeri geometrici:

baad928f5a2fd7b42e114c3b3bbb55e9

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Este adevărat că:

3cfe49a68a6fcb458c96290e174a7596

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Se obţine benzoat de sodiu din acid benzoic şi:

e580ae3da0af7ca10c74bfff4ef24174

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Acidul benzoic este un acid mai slab decât:

6e301774a83cab1c97eb675687b9daaf

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N-etiliden-etii-amina:

a35ccb7d9e73e6820f8515843434e54c

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Arde mai bine in motoarele cu explozie ale automobilelor (are cifra octanici 100):

58608c1cdd844016394c770a6748e8ef

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În compusul C₄H₆ pot exista:

fc8ff2c2edcd205b612b8c2ab66bf0e3

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Sunt mai acizi decât HN=CH-CH₂-COOH:

ac06244e527686d4656184ab56dab6a1

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Sunt mai aicizi decât CH₂(Br)-COOH:

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