OBLICZ ile gramow substancji nalezy rozpuscic w 360g wody abyotrzymac roztwor 20% DAJE NAJ za Tresciwe,krotkie,zrozumiale i dobre rozwiazanie !
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Cp= ms/ mr * 100%
mr= mw + ms
Cp=ms/ mw+ms * 100%
Cp(mw + ms) = 100ms
20(360g +ms) = 100ms
7200g +20ms= 100ms |-20ms
7200g= 80ms | /80
ms= 90g
spr.
Cp= 90g / 90g+360g /100%
Cp= 20%
Pozdrawiam, kate66 ;)