C2H2. Ethene kana kuti acetylene igas risina kana oxygen asi rakasangana paine spark zvinoputika.Panenge paitika chemical reaction ye(+)molecule ne(-)molecule.Kana (+) ne(-)atom kana molecule zvakabatana panoitika reaction inoshamisira.Saka ethene inogadirwa kubva mucalcium carbide nemvura uchishandisa destrucive distillation ndopanobuda ethene.