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totoboromeo
@totoboromeo
April 2023
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bonjour, pouvez-vous m'aider pour l'exercice 19 svp
pour moi, les réponses sont les suivantes, si elle sont fausses, merci a vous de me le dire
1. NaCl(s) --> NaCl(l)
2. N= m/m de l'échantillon
m de l'échantillon = 3.82×10^-26 + 5.89×10^-26×5 = 4.885×10^-25
m = 1.5L = 1.5kg
N = 1.5/4.855×10^-25
≈ 1.54×10^24
3. n = N/Nª
= 3.09×10^24/6.02×10^23
≈ 5.13 mol
merci d'avance
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