a) m\(_C=1.60\%=0,6\left(kg\right)=600\left(g\right)\)
\(n_C=\frac{600}{12}=50\left(g\right)\)
\(m_S=1.0,8\%=0,008\left(kg\right)=8\left(g\right)\)
\(n_S=\frac{8}{32}=0,25\left(mol\right)\)
\(C+O2-->CO2\)
50--->50(mol)
\(S+O2-->SO2\)
0,25-0,25(mol)
\(\sum n_{O2}=50+0,25=50,25\left(mol\right)\)
\(V_{O2}=50,25.22,4=1125,6\left(l\right)\)
b)\(1kg=1000g\)
\(n_{CH4}=\frac{1000}{16}=62,5\left(mol\right)\)
\(CH4+2O2-->CO2+2H2O\)
\(n_{O2}=2n_{CH4}=125\left(mol\right)\)
\(V_{O2}=125.22,4=2800\left(l\right)\)