Siemka , pomozecie mi z chemi ? Do 0,5kg 4 procentowego roztworu soli dosypano 20g. tej soli. Oblicz stezenie procentowe otrzymanego roztworu :) :)
TUREK - WIELKOPOLSKA :)
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500 g --- 4 %
520 g --- x %
x = 4 x 520/500 = 4,16 %