M(Fe(OH)2)=90г/моль
n(Fe(OH)2)=18/90=0,2моль
N(O)=0,2*2*6*10²³=2,4*10²³моль⁻¹
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M(Fe(OH)2)=90г/моль
n(Fe(OH)2)=18/90=0,2моль
N(O)=0,2*2*6*10²³=2,4*10²³моль⁻¹