Ancien Responsable Matière Antoinee Posted June 13, 2020 Ancien Responsable Matière Share Posted June 13, 2020 Salutations ! (QCM 2 item B) " [...] la mention 9CH signifie que le produit initial a subit une dilution au 1/900ème" compté faux, ça ok mais ce qui me pose problème c'est la correction qui dit que c'est 9/100ème car 9 fois une dilution infinitésimale, mais il me semblait avoir vu dans une correction de colle de cette année ou directement une réponse de JmS sur moodle que la correction ça serait plutôt (1/100)9 du coup est-ce-que quelqu'un peut m'aider svp ? Merci d'avance ! Quote Link to comment Share on other sites More sharing options...
Solution Chat_du_Cheshire Posted June 13, 2020 Solution Share Posted June 13, 2020 Hello Antoine, dilution de n CH ==> concentration de 10^-2n M Donc si n = 9, la dilution c'est 10^-18 M, donc 1/10^18 donc en effet (1/100)^9 Quote Link to comment Share on other sites More sharing options...
Ancien Responsable Matière Antoinee Posted June 13, 2020 Author Ancien Responsable Matière Share Posted June 13, 2020 Okay merci le chat Quote Link to comment Share on other sites More sharing options...
Chat_du_Cheshire Posted June 13, 2020 Share Posted June 13, 2020 il y a 4 minutes, Antoinee a dit : Okay merci le chat à ton service le chat (toi aussi t'as un chat en pdp!!) Quote Link to comment Share on other sites More sharing options...
Ancien Responsable Matière Antoinee Posted June 13, 2020 Author Ancien Responsable Matière Share Posted June 13, 2020 Héhé bien sur, je prends exemple mdrr Quote Link to comment Share on other sites More sharing options...
V16 Posted June 13, 2020 Share Posted June 13, 2020 (edited) salut les chats, petite question, comment on passe de 1/10^18 à ca (1/100)^9? Edited June 13, 2020 by V16 Quote Link to comment Share on other sites More sharing options...
Chat_du_Cheshire Posted June 13, 2020 Share Posted June 13, 2020 il y a 5 minutes, V16 a dit : salut les chats, petite question, comment on passe de 1/10^18 à ca (1/100)^9? (1/100)^9 = 1/(100)^9 = 1/(10^2)^9 = 1/10^18 Quote Link to comment Share on other sites More sharing options...
V16 Posted June 13, 2020 Share Posted June 13, 2020 ah oui d'accord mercii Quote Link to comment Share on other sites More sharing options...
Chat_du_Cheshire Posted June 13, 2020 Share Posted June 13, 2020 il y a 14 minutes, V16 a dit : ah oui d'accord mercii l'UE4 te manque je le sais Quote Link to comment Share on other sites More sharing options...
V16 Posted June 13, 2020 Share Posted June 13, 2020 il y a 10 minutes, Chat_du_Cheshire a dit : l'UE4 te manque je le sais Nonnnn traumatisme mdr Quote Link to comment Share on other sites More sharing options...
Chat_du_Cheshire Posted June 13, 2020 Share Posted June 13, 2020 Il y a 7 heures, V16 a dit : Nonnnn traumatisme mdr @lénouillette personne n'aime donc cette UE Quote Link to comment Share on other sites More sharing options...
Ancien Responsable Matière Lénouillette Posted June 13, 2020 Ancien Responsable Matière Share Posted June 13, 2020 à l’instant, Chat_du_Cheshire a dit : @lénouillette personne n'aime donc cette UE C'est un tort, love UE4 Quote Link to comment Share on other sites More sharing options...
Chat_du_Cheshire Posted June 13, 2020 Share Posted June 13, 2020 il y a 2 minutes, lénouillette a dit : C'est un tort, love UE4 il est vrai, maintenant va dormir. Quote Link to comment Share on other sites More sharing options...
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