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Sagot :

Bonjour,

Cm1 x V1 = Cm2 x V2

⇔ V1 = (Cm2 x V2)/Cm1

Attention, V2 = 100 mL = 0,1 L

V1 = (3,2 x 10^-1 x 0,1)/4,0

V1 = (3,2 x 10^-2)/4,0

V2 = 8,0 x 10^-3 L = 8,0 mL à prélever

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