Draw a bond-line structure for each of the following compounds:

a) 3-isopropyl-2,4-dimethyl-2-pentene< br /> b) 4-ethyl-2-methyl-2-hexene
c) 1,2-dimethylcyclobutene

answerto predict;

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".