w(O)=n*Ar(O)*100%/Mr(EO3)
Mr(EO3)=n*Ar(O)*100%/w(O)=3*16*100%/37.8%=127
Ar(E)=Mr(EO3)-3Ar(O)=127-48=79
E-Se(селен)
w(O)=n*Ar(O)*100%/Mr(EO3)
Mr(EO3)=n*Ar(O)*100%/w(O)=3*16*100%/37.8%=127
Ar(E)=Mr(EO3)-3Ar(O)=127-48=79
E-Se(селен)