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TS/AP/SEANCE 2 QUANTITE DE MATIERE; MASSE; concentration; masse volumique….

TS/AP/SEANCE 2 QUANTITE DE MATIERE; MASSE; concentration; masse volumique…. Exercice 1: n(Al) = 7,4.10 -2 mol m (S) = 3,5 g M(Al 2 S 3 ) = 150,3 g.mol -1 n(Al 2 S 3 ) = 3,7.10 -2 mol Exercice 2: n(Cu 2+ ) = 1,5.10 -2 mol n(Al) = 2,0.10 -2 mol

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TS/AP/SEANCE 2 QUANTITE DE MATIERE; MASSE; concentration; masse volumique….

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  1. TS/AP/SEANCE 2QUANTITE DE MATIERE; MASSE; concentration; masse volumique….

  2. Exercice 1: n(Al) = 7,4.10-2 mol m(S) = 3,5 g M(Al2S3) = 150,3 g.mol-1 n(Al2S3) = 3,7.10-2 mol Exercice 2: n(Cu2+) = 1,5.10-2 mol n(Al) = 2,0.10-2 mol [Al3+] = 3,3.10-3mol.L-1Cm(Al3+) = 8,9.10-2g.L-1 m(Cu) = 9,9.10-2 g Exercice 3: M(C5H12O6) = 88 g.mol-1 m(C5H12O6) = 44 g V(C5H12O6) = 54 mL M(C2H4O2) = 60 g.mol-1 m(C2H4O2) = 6,0 g V(C5H12O6) = 5,7 mL

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