V=200cm³=0,2dm³
Cn=0,1mol/dm³
n=Cn·V
n=0,2·0,1=0,02
1 mol - 40g
0,02mola - x
x=0,8g
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V=200cm³=0,2dm³
Cn=0,1mol/dm³
n=Cn·V
n=0,2·0,1=0,02
1 mol - 40g
0,02mola - x
x=0,8g