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mNa=23g/mol
l.atom.Mg=12u
l.atom.Na=11u
mNa
11*0,166*10[-23]=1,826*10[-23]g
1,826*10[-23]*6,02*10[23]=10,99252=11g/mol
mMg
12*0,166*10[-23]=1,992*10[-23]g
1,992*10[-23]*6,02*10[23]=11,99184=12g/mol