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ms-20g
mr=ms+mw = 20g+280g=300g
C%=ms*100%/mr = 20*100/300 %= 6,67%
2.W 100 g wody rozpuszczono 20g wodorotlenku potasu. Oblicz stężenie procentowe tego roztworu.
ms-20g
mr=ms+mw=20g+100g=120g
C%=ms*100%/mr = 20*100/120 %= 16,67%