Chemical substance In organic chemistry, there can be more than one chemical compound with the same composition and molecular weight. Generally, these are called isomers. Isomers usually have substantially different chemical properties, and often may be isolated without spontaneously interconverting. A common example is glucose vs. fructose. The former is an aldehyde, the latter is a ketone. Their interconversion requires either enzymatic or acid-base catalysis. However, tautomers are an exception: the isomerization occurs spontaneously in ordinary conditions, such that a pure substance cannot be isolated into its tautomers, even if these can be identified spectroscopically or even isolated in special conditions. A
Magic in the Air (Magic System song) Magic in the Air (Magic System song) "Magic in the Air" is a 2014 single by Ivorian musical group Magic System, featuring Moroccan singer Chawki and produced by Moroccan producer RedOne. The track also appears on Magic system's album "Africainement vôtre," released on 19 May 2014. The association football themed song focusing on African football was produced by Swedish-Moroccan producer RedOne with the catchy refrain saying On t'invite à la magie, y a pas de raccourci,<br> Oublie tes soucis, viens faire la folie<br>Feel the magic in the air, allez allez allez, <br>Levez les mains en l'air, allez allez allez. which