<prompt> Alkenes na alkeni ni viungo viwili vya kemikali, ambavyo vina sifa tofauti za kimwili na kemikali, na vinaweza kuathiriwa na athari za kemikali katika viwanda mbalimbali, kama vile utengenezaji wa plastiki, mafuta, na kemikali nyingine.  <response>: Alkanes ni aina mbili za msingi za hydrocarbons: alkane, alkane, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene, alkene 