Odpowiedzi

2010-04-06T13:31:24+02:00
Zad.1
mr=300g
Cp=15%
ms=?
mw=?
Cp=ms/mr*100%
ms=Cp*mr/100%
ms=15%*300g/100%
ms=45g
mw=mr-ms=300-45=255g

Zad.2
mr=250g
ms=5g
Cp=?
Cp=ms/mr*100%
Cp=5g/250g*100%
Cp=2%

Zad.3
Cm=0,5mol/dm³
n=5moli
v=?
Cm=n/v
v=n/Cm
v=5moli/0,5mol/dm³
v=10dm³