\(PTHH: \)
\(C+O_2-t^o-> CO_2\)\((1)\)
\(S+O_2-t^o-> SO_2\) \((2)\)
Theo đề, cacbon chiếm 2,24% về khối lượng nên ta có:
\(mC=\dfrac{9,84.20}{100}=1,968 (g)\)
\(=> nC=\dfrac{1,986}{12}=0,164(mol)\)
Theo PTHH (1) \(nCO_2=nC=0,164(mol)\)
\(mS=mhh - mC = 9,84-1,968 =7,872(g)\)
\(=> nS=\dfrac{7,872}{32} = 0,246(mol)\)
Theo PTHH (2) \(nSO_2 = nS = 0,246 (mol)\)
\(\%mCO_2=\dfrac{0,164.44.100}{0,164.44+0,246.64}=31,43\%\)
\(=>\%mSO_2=100\%-31,43\%=68,57\%\)