Em tham khảo nha :
\(\begin{array}{l}
1)\\
S + {O_2} \xrightarrow{t^0} S{O_2}\\
{n_S} = \dfrac{m}{M} = \dfrac{{4,8}}{{32}} = 0,15mol\\
{n_{{O_2}}} = {n_S} = 0,15mol\\
{V_{{O_2}}} = n \times M = 0,15 \times 22,4 = 3,36l\\
{V_{kk}} = 5{V_{{O_2}}} = 16,8l\\
2)\\
2KCl{O_3} \xrightarrow{t^0} 2KCl + 3{O_2}\\
{n_{KCl{O_3}}} = \dfrac{m}{M} = \dfrac{{36,75}}{{122,5}} = 0,3mol\\
{n_{{O_2}}} = \dfrac{3}{2}{n_{KCl{O_3}}} = 0,45mol\\
{V_{{O_2}}} = n \times M = 0,45 \times 22,4 = 10,08l\\
3)\\
4P + 5{O_2} \xrightarrow{t^0} 2{P_2}{O_5}\\
{n_P} = \dfrac{m}{M} = \dfrac{{15,5}}{{31}} = 0,5mol\\
{n_{{O_2}}} = \dfrac{5}{4}{n_P} = 0,625mol\\
{V_{{O_2}}} = n \times M = 0,625 \times 22,4 = 14l
\end{array}\)