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Morgane41
@Morgane41
May 2019
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J'aurai besoin d'aide pour les exercices 2 et 3 s'il vous plaît
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Mrvalentindu622
Exercice 2)
1.
a) n=N/Na = 4,86*10^21/6.02*10^23=0.008 mol
b) n=N/Na = 8,35*10^24/6.02x10^23=13,87 mol
2.
N=Na*n = 6,02*10^23*5.00*10^-3 = 3.01*10^21 nombre d'entités
N=Na*n = 6,02*10^23*12= 7.22*10^24 nombre d'entités
Exercice 3)
1. a) n=N/Na = 1.8×10^22/6,02×10^23=0.02 mol
b) C=n/v = 0.02/150*10^-3=0.13 m.L-1
2. n=c*v = 0,13*25*10^-3=0.003 mol
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Lista de comentários
1.
a) n=N/Na = 4,86*10^21/6.02*10^23=0.008 mol
b) n=N/Na = 8,35*10^24/6.02x10^23=13,87 mol
2.
N=Na*n = 6,02*10^23*5.00*10^-3 = 3.01*10^21 nombre d'entités
N=Na*n = 6,02*10^23*12= 7.22*10^24 nombre d'entités
Exercice 3)
1. a) n=N/Na = 1.8×10^22/6,02×10^23=0.02 mol
b) C=n/v = 0.02/150*10^-3=0.13 m.L-1
2. n=c*v = 0,13*25*10^-3=0.003 mol