N(Cu)=n*Na=2.5*6.02*10^23=15.05*10^23 атомов.
n=N/Na
N=Na*n
N=2,5*6.02*10 ^{23} =15.05*10 ^{23} =1.505*10 ^{24} атомов
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N(Cu)=n*Na=2.5*6.02*10^23=15.05*10^23 атомов.
Verified answer
n=N/Na
N=Na*n
N=2,5*6.02*10 ^{23} =15.05*10 ^{23} =1.505*10 ^{24} атомов