ile gramów bromku sodu (NaBr) znajduje sie w 0,2 dm{szesciennych} 0,1 molowego roztworu?
M(NaBr)=23g/mol+80g/mol=103g/mol
Vr=0,2dm³
Cm=0,1mol/dm³
n=?
m=?
Cm=n/Vr /*Vr
n=Cm*Vr
n=0,1mol/dm³*0,2dm³
n=0,02mol
n=m/M /*M
m=n*M
m=0,02mol*103g/mol
m=2,06g
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M(NaBr)=23g/mol+80g/mol=103g/mol
Vr=0,2dm³
Cm=0,1mol/dm³
n=?
m=?
Cm=n/Vr /*Vr
n=Cm*Vr
n=0,1mol/dm³*0,2dm³
n=0,02mol
n=m/M /*M
m=n*M
m=0,02mol*103g/mol
m=2,06g