Calculs de pH et solutions tampons
30:19
Digramme E=f(pH) du scandium.
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Les acides et les bases
10:46
Pouvoir tampon
4:00:37
4 Horas Chopin para Estudar, Concentrarse, Relaxarse
3:31:19
Why the rush? - lo-fi beats for work/study / cat jazz
3:02:38
Alpha Waves | Improve Your Memory | Super Intelligence
23:13
20 Minutes of Confused Americans in Europe.. 🤣😂
15:23