Respostas

2013-10-24T16:30:57-02:00
Na2co3=106

C=m1/V
0,1=m1/1
m1=0,1g

n1=m1/MM1
n1=0,1/106
n1=9,4 . 10^-4 mol

M=n1/V
M=9,4 . 10^-4/1
M=9,4 . 10^-4 mol/L

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