Câu hỏi 8

\(\left\{ \matrix{ {O_2}\,\,{{{V_1}} \over 4} \hfill \cr {O_3}{{3{V_1}} \over 4} \hfill \cr} \right.\,\,\,\,\,\,\,\,\,\& \,\,\,\left\{ \matrix{ C{H_3}N{H_2}\,\,{{2{V_2}} \over 3} \hfill \cr {C_2}{H_5}N{H_2}{{{V_2}} \over 3} \hfill \cr} \right.\,\,\, \Leftrightarrow \left\{ \matrix{ C{O_2}\,\,{{4{V_2}} \over 3} \hfill \cr {H_2}O{{17{V_2}} \over 6} \hfill \cr} \right.\)

Bảo toàn nguyên tố O

\(\eqalign{ & 2.{n_{O({O_2})}} + 3.{n_{O({O_3})}} = 2.{n_{C{O_2}}} + {n_{{H_2}O}} \cr & {{2.{V_1}} \over 4} + {{3.3{V_1}} \over 4} = {{2.4{V_2}} \over 3} + {{17{V_2}} \over 6} \to {{{V_1}} \over {{V_2}}} = 2 \cr} \)

Chọn B