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Beylejordan
@Beylejordan
April 2019
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Je ne comprend rien en physique pouvez vous m aider
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Zeloya
Exercice 6 :
V = 750 ml = 0.75 l
m = 5.6 g
M = 342.3 g/mol
Y = 5.6g/0.75l = 7,46 g/l
1) C = Y/M = 7,76 g/l / 342.3 g/mol = 0.2179 mol/l
2) Vo = 250 ml = 0.25 l
Vf = 750 ml = 0.75 l
Co = 0.2179 mol/l
Co.Vo = Cf.Vf
Cf = (Co.Vo)/ Vf
= (0.2179 . 0.25)/ 0.75
= 0.07263 mol/l
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Beylejordan
merci beaucoup
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V = 750 ml = 0.75 l
m = 5.6 g
M = 342.3 g/mol
Y = 5.6g/0.75l = 7,46 g/l
1) C = Y/M = 7,76 g/l / 342.3 g/mol = 0.2179 mol/l
2) Vo = 250 ml = 0.25 l
Vf = 750 ml = 0.75 l
Co = 0.2179 mol/l
Co.Vo = Cf.Vf
Cf = (Co.Vo)/ Vf
= (0.2179 . 0.25)/ 0.75
= 0.07263 mol/l