ms=70gmw=100gmr=ms+mw=170gCp=ms*100%/mrCp=70*100/170Cp = 41,18%
M Pb(NO3)2=331g/mol
m=70
n=m/M
n=0,21mola
mr=170gd=1,25g/cm3v=m/dv=170/1,25v=136cm3=0,136dm3
v=0,136dm3
Cm=n/v
Cm=0,21/0,136
Cm = 1,54mol/dm3
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ms=70g
mw=100g
mr=ms+mw=170g
Cp=ms*100%/mr
Cp=70*100/170
Cp = 41,18%
M Pb(NO3)2=331g/mol
m=70
n=m/M
n=0,21mola
mr=170g
d=1,25g/cm3
v=m/d
v=170/1,25
v=136cm3=0,136dm3
n=0,21mola
v=0,136dm3
Cm=n/v
Cm=0,21/0,136
Cm = 1,54mol/dm3