Em tham khảo nha :

\(\begin{array}{l}
1)\\
{n_{C{O_2}}} = \dfrac{m}{M} = \dfrac{{11}}{{44}} = 0,25mol\\
2)\\
{n_{{O_2}}} = \dfrac{V}{{22,4}} = \dfrac{{8,96}}{{22,4}} = 0,4mol\\
3)\\
{n_H} = 2{n_{{H_2}O}} = 4mol\\
4)\\
{n_{C{O_2}}} = \dfrac{m}{M} = \dfrac{{8,8}}{{44}} = 0,2mol\\
{n_C} = {n_{C{O_2}}} = 0,2mol\\
{m_C} = n \times M = 0,2 \times 12 = 2,4g\\
5)\\
{n_{C{O_2}}} = \dfrac{V}{{22,4}} = \dfrac{{11,2}}{{22,4}} = 0,5mol\\
{n_C} = {n_{C{O_2}}} = 0,5mol\\
{N_C} = n \times {N_A} = 0,5 \times 6 \times {10^{23}} = 3 \times {10^{23}}\\
6)\\
{V_{{O_2}}} = n \times 22,4 = 0,2 \times 22,4 = 4,48l\\
7)\\
{V_{kk}} = 5{V_{{O_2}}} = 5 \times 2 = 10l\\
8)\\
2{H_2} + {O_2} \to 2{H_2}O\\
{n_{{O_2}}} = \dfrac{1}{2}{n_{{H_2}}}\\
 \Rightarrow {V_{{O_2}}} = \frac{1}{2}{V_{{H_2}}} = 3l
\end{array}\)