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The density of a 3M Na2S2O3 solution is 1.25 g per mL, What is the molalities of Na^+ and S2O3^2- ions ?

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The density of a 3M Na2S2O3 solution is 1.25 g per mL, What is the molalities of Na+ and S2O3 2- ions ? 

(a) 3.865, 7.732

(b) 7.732, 3.865

(c) 1.933, 7.732

(d) 7.732, 1.933

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1 Answer

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Correct option (b) 7.732, 3.865

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