\(\left\{{}\begin{matrix}\%S=\dfrac{32.1}{80}.100\%=40\%\\\%O=100\%-40\%=60\%\end{matrix}\right.\)
\(\%S=\dfrac{32}{80}.100\%=40\%\\ \%O=\dfrac{16.3}{80}.100\%=60\%\)
a, MSO3=32+16.3=80g/mol
%S=\(\dfrac{32.100}{80}=40\%\)
%O=\(\dfrac{16.3.100}{80}=60\%\)