w(NaCl)=5:505=0.0099
m2(NaCl)=2*0.0099=0.0198 г
n(NaCl)=0.0198:58.5=0.0003384615
N(Na)=0.0003384615*6.02*10^23=2.0375383*10^20
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w(NaCl)=5:505=0.0099
m2(NaCl)=2*0.0099=0.0198 г
n(NaCl)=0.0198:58.5=0.0003384615
N(Na)=0.0003384615*6.02*10^23=2.0375383*10^20