Oblicz ile gramów substancju należy rozpuścic w 360 gramach wody, aby otrzymac roztwór 20% ?
Cp=20%
mw=360g
ms=?
Cp=ms/ms+mw * 100%
20%=ms/ms+360g * 100% /*ms+360g
20ms+7200g=100ms
80ms=7200g /:80
ms=90g
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Cp=20%
mw=360g
ms=?
Cp=ms/ms+mw * 100%
20%=ms/ms+360g * 100% /*ms+360g
20ms+7200g=100ms
80ms=7200g /:80
ms=90g