Дано:

m(KOH) = 200 g

Найти:

m(HCOOH) - ?

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n(KOH) = 200 g / 56 g / mol = 3.571 mol

KOH + HCOOH = HCOOK + H2O

За УХР: n(KOH) = n(HCOOH) = 3.571 mol ;

m(HCOOH) = 3.571 mol * 46 g / mol = 164.266 g = 164.27 g

Ответ: 164.27 g .