$S + O_2 \xrightarrow{t^o} SO_2$
$2KClO_3 \xrightarrow{t^o} 2KCl + 3O_2$
$n_{O_2} = n_S = \dfrac{6,4}{32} = 0,2(mol)$
$n_{KClO_3} = \dfrac{2}{3}n_{O_2} = \dfrac{2}{15}(mol)$
$m_{KClO_3} = \dfrac{2}{15}.122,5 = 16,33(gam)$
PTHH: \(S+O_2\xrightarrow[]{t^o}SO_2\)
\(KClO_3\xrightarrow[MnO_2]{t^o}KCl+\dfrac{3}{2}O_2\uparrow\)
Ta có: \(n_S=\dfrac{6,4}{32}=0,2\left(mol\right)=n_{O_2}\)
\(\Rightarrow n_{KClO_3}=\dfrac{2}{15}\left(mol\right)\) \(\Rightarrow m_{KClO_3}=\dfrac{2}{15}\cdot122,5\approx16,33\left(g\right)\)