n=M/m
Mr(H2)=1+1=2
M(H2)=2г/моль
n=2/1=2моль
N=12,04*10^23
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n=M/m
Mr(H2)=1+1=2
M(H2)=2г/моль
n=2/1=2моль
N=12,04*10^23