Em tham khảo nha :

\(\begin{array}{l}
1)\\
{d_{{H_2}S/{N_2}}} = \dfrac{{{M_{{H_2}S}}}}{{{M_{{N_2}}}}} = \dfrac{{34}}{{28}} = 1,214\\
{d_{{O_2}/{N_2}}} = \dfrac{{{M_{{O_2}}}}}{{{M_{{N_2}}}}} = \dfrac{{32}}{{28}} = 1,14\\
{d_{{H_2}/{N_2}}} = \dfrac{{{M_{{H_2}}}}}{{{M_{{N_2}}}}} = \dfrac{2}{{28}} = \frac{1}{{14}}\\
{d_{C{O_2}/{N_2}}} = \dfrac{{{M_{C{O_2}}}}}{{{M_{{N_2}}}}} = \dfrac{{44}}{{28}} = 1,57\\
2)\\
{d_{C{H_4}/kk}} = \dfrac{{16}}{{29}} = 0,55\\
{d_{{C_2}{H_4}/kk}} = \dfrac{{28}}{{29}} = 0,9655\\
{d_{{C_2}{H_2}/kk}} = \dfrac{{26}}{{29}} = 0,897\\
{d_{{C_4}{H_{10}}/kk}} = \dfrac{{58}}{{29}} = 2\\
3)\\
{M_X} = 1,375{M_{{O_2}}} = 1,375 \times 32 = 44dvC\\
{M_Y} = 0,0625{M_{{O_2}}} = 0,0625 \times 32 = 2dvC\\
{M_Z} = 2{M_{{O_2}}} = 2 \times 32 = 64dvC\\
{M_A} = 4,4375{M_{{O_2}}} = 4,4375 \times 32 = 142dvC
\end{array}\)

Ok