Have a solution containing 16.2% by mass of sodium thiosulfite, Na2S2O3 a) How many moles of Na2S2O3 are in 80 g of solution? b) if you want to make a solution of 500 mL with a concentration of 1% mass Na2S2O3, how much 16.2% Na2S2O3 solution should be taken, if it is considered that the mass density of the final solution is 1 g/cc BM Na = 23 ; BM S = 32 ; BM O = 16

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