\(m_O=\dfrac{80.60}{100}=48\left(g\right)\Rightarrow n_O=\dfrac{48}{16}=3\left(mol\right)\)
\(m_S=80-48=32\left(g\right)\Rightarrow n_S=\dfrac{32}{32}=1\left(mol\right)\)
=> CTHH: SO3
m O=40%
Gọi công thức SxOy
m O=\(80.60\%\)=48g
n O=\(\dfrac{48}{16}\)=3 mol
nS=\(\dfrac{32}{32}\)=1mol
=>x:y=1:3
=>CTHH :SO3