Ta có : % Fe = \(\frac{56.2}{56.2+16.3}.100\%=70\%\)
% O = 100% - 70%=30%
%mFe = \(\frac{56.2}{56.2+16.3}\) x 100% = 70%
%mO = 100% - 70% = 30%
Ta có :
% Fe = \(\dfrac{56,2}{56,2+16,3}.100\%\)=70%
% O = 100% - 70%=30%
\(M_{Fe_2O_3}=56.2+16.3=160\left(g/mol\right)\)
\(\%Fe=\dfrac{56.2}{160}.100\%=70\%\)
\(\%O=\dfrac{16.3}{160}.100\%=30\%\)
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