Odpowiedzi

2010-04-05T11:34:35+02:00
1. Cmol=?
n=6moli
Vr=2dm3

Cmol=n/Vr=6moli/2dm3=3mol/dm3

2. mCaCl2=50g
Vr=150cm3=0,15dm3
MCaCl2=40g/mol+2*35,5g/mol=111g/mol

n=m/M=50g/111g/mol=0,45mola
Cmol=n/Vr=0,45mola/0,15dm3=3mol/dm3