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Representatives of alkanes, benzene, olefins, alcohols, carboxyl groups and esters and their spatial configurations?

Alkane: represented by CH4, regular tetrahedron, nonpolar molecule, benzene and its homologues: represented by benzene, regular hexagon, planar molecule olefin, represented by ethylene C2H4, planar molecule, alcohol, represented by ethanol CH3CH2OH, polar molecule, hard to say, carboxylic acid, represented by acetic acid, CH3COOH, polar molecule, representative ester, ethyl acetate.