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Melouu
Go to solution Solved by Reïner,

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salut ! 

 

je galere par rapport à ce QCM pour les items ABC (vrai : BC)

1545651554-capture-d-ecran-2018-12-24-a-

 

je trouve

m= 36 ng = 36 * 10-9 g ; M = 99 g/mol ; T = 6*60*60= 21600 s

Du coup :

A = 0.7 * 36 *10-9*6*1023  / 99*21600 = 7.07 * 10Bq 

Ca correspond donc pas du tout avec les réponses comptées justes... quelqu'un peut m'aider??

Merci d'avance!

 

 

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