Answer: - The first molecule is cyclohexane, a cyclic alkane with the formula C6H12It has six carbon atoms arranged in a ring, with each carbon atom bonded to two hydrogen atoms.- The second molecule is hex-3-ene, a hydrocarbon with a double bond between the third and fourth carbon atoms. Its formula is CH3CH2CH=CHCH2CH3- The third molecule is buta-1,3-diene, a hydrocarbon with two double bonds between the first and second and the third and fourth carbon atoms. Its formula is CH2=CH-CH=CH2HOPE IT HELPS YOU BETTER