ДАНО
m(C17H35COOH) = 200 kg
W(NaOH) = 25%
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m(ppa NaOH)-?
200 kg Xkg
C17H35COOH+NaOH-->C17H35COONa+H2O
284 40
M(C17H35COOH)=284 kg/kmol , M(NaOH) = 40 kg/kmol
X = 200*40 / 284 = 28.17 kg
m(ppa NaOH) = 28.17*100% / 25% = 112.68 kg
ответ 112.68 кг