Oblicz ile cm3 wody znajduje się w 400g pięcio procentowego roztworu wodnego soli .
mr=400g
ms=?
cp=5%
cp = ms/mr * 100%
cp/100% = ms/mr
5%/100% = ms/400g
0,05=ms/400g
ms=0,05 * 400g
ms = 20g
d wody = 1g/cm³
d=m/V
d*V=m
V=m/d
V=20g / (1g/cm³)=20cm³
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mr=400g
ms=?
cp=5%
cp = ms/mr * 100%
cp/100% = ms/mr
5%/100% = ms/400g
0,05=ms/400g
ms=0,05 * 400g
ms = 20g
d wody = 1g/cm³
d=m/V
d*V=m
V=m/d
V=20g / (1g/cm³)=20cm³