1)
Các phản ứng xảy ra:
\(2KCl{O_3}\xrightarrow{{{t^o}}}2KCl + 3{O_2}\)
\(2KMn{O_4}\xrightarrow{{{t^o}}}{K_2}Mn{O_4} + Mn{O_2} + {O_2}\)
2)
Phản ứng xảy ra:
\(4Al + 3{O_2}\xrightarrow{{{t^o}}}2A{l_2}{O_3}\)
Ta có:
\({n_{Al}} = \frac{{10,8}}{{27}} = 0,4{\text{ mol}}\)
\( \to {n_{A{l_2}{O_3}}} = \frac{1}{2}{n_{Al}} = 0,2{\text{ mol}}\)
\( \to {m_{A{l_2}{O_3}}} = 0,2.(27.2 + 16.3) = 20,4{\text{ gam}}\)
\({n_{{O_2}}} = \frac{3}{4}{n_{Al}} = 0,3{\text{ mol}}\)
\( \to {V_{{O_2}}} = 0,3.22,4 = 6,72{\text{ lít}}\)
\( \to {V_{kk}} = 5{V_{{O_2}}} = 6,72.5 = 33,6{\text{ lít}}\)