96. Решение задачки по химии №009 649

What weighed portion of the drug with a mass fraction of streptocide 60% should be taken if during the titration of streptocide (M (1/2 streptocide) = 172.21 g / mol) in an acidic medium in the presence of KBr, 21.05 ml of a 0.09872 M solution of KBrO3 were consumed ?

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