a) Gọi số mol N₂, O₂ trong 6,72l khí A lần lượt là a, b

=> \(\left\{{}\begin{matrix}28a+32b=8,8\\a+b=\dfrac{6,72}{22,4}=0,3\end{matrix}\right.\)

=> \(\left\{{}\begin{matrix}a=0,2\left(mol\right)\\b=0,1\left(mol\right)\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%V_{N_2}=\dfrac{0,2}{0,3}.100\%=66,67\%\\\%V_{O_2}=\dfrac{0,1}{0,3}.100\%=33,33\%\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%m_{N_2}=\dfrac{28.0,2}{8,8}.100\%=63,64\%\\\%m_{O_2}=\dfrac{32.0,1}{8,8}.100\%=36,36\%\end{matrix}\right.\)

b) 

\(n_A=0,3\left(mol\right)\)

\(\Rightarrow n_{CO_2}=0,3\left(mol\right)\)

\(\Rightarrow m_{CO_2}=0,3.44=13,2\left(g\right)\)

c) 2,2g A có thể tích là 1,68 lít

=> \(V_{H_2}=1,68\left(l\right)\)

\(n_{O_2}=\dfrac{6,4}{32}=0,2\left(mol\right)\)

\(n_{CO_2}=\dfrac{13,2}{44}=0,3\left(mol\right)\)

=> \(\overline{M}=\dfrac{6,4+13,2}{0,2+0,3}=39,2\left(g/mol\right)\)

Ta có: \(n_{O_2}=\dfrac{3,2}{32}=0,1\left(mol\right)\)

\(n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)\)

\(\Rightarrow\overline{M}_Y=\dfrac{3,2+8,8}{0,1+0,2}=40\left(g/mol\right)\)

\(\Rightarrow d_{Y/H_2}=\dfrac{\overline{M}_Y}{M_{H_2}}=\dfrac{40}{2}=20\)

\(a,\left\{{}\begin{matrix}n_{O_2}=1.30\%=0,3\left(mol\right)\\n_{CO_2}=1.20\%=0,2\left(mol\right)\\n_T=1-0,3-0,2=0,5\left(mol\right)\end{matrix}\right.\)

\(b,m_{O_2}=0,3.32=9,6\left(g\right)\)

\(c,m_{hh}=\dfrac{9,6}{49,48\%}=19,4\left(g\right)\\ m_{CO_2}=0,2.44=8,8\left(g\right)\\ \rightarrow m_T=19,4-9,6-8,8=1\left(g\right)\\ \rightarrow M_T=\dfrac{1}{0,5}=2\left(\text{g/mol}\right)\\ \rightarrow T:H_2\)

a. %V (ở cùng điều kiện) cũng là %n

\(Tacó:\%V_T=100-30-20=50\%\\ Trong1molhỗnhợp:\\ n_{O_2}=1.30\%=0,3\left(mol\right)\\ n_{CO_2}=1.20\%=0,2\left(mol\right)\\ n_T=1.50\%=0,5\left(mol\right)\\ b.m_{O_2}=0,3.32=9,6\left(g\right)\\ c.\%m_{O_2}tronghỗnhợplà49,48\%\\ Trong1molhỗnhợp:m_{hh}=\dfrac{9,6}{49,48\%}=19,4\left(g\right)\\ m_{CO_2}=0,2.44=8,8\left(g\right)\\ \Rightarrow m_T=19,4-9,6-8,8=1\left(g\right)\\ \Rightarrow M_T=\dfrac{1}{0,5}=2\\ \Rightarrow TlàH_2\)

\(n_{H_2}=\dfrac{12.10^{22}}{6.10^{23}}=0,2\left(mol\right)\); \(n_{N_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

=> m_hh = 0,5.32 + 0,25.28 + 0,2.2 + 3,2 = 26,6(g)

\(n_{H_2}=\dfrac{1,2.10^{23}}{6.10^{23}}=0,2\left(mol\right)\)

\(n_{SO_2}=\dfrac{6,4}{64}=0,1\left(mol\right)\)

=> V_hh = (1,5 + 2,5+ 0,2 +0,1).22,4 = 96,32(l)

m_hh = 1,5.32 + 2,5.28 + 0,2.2 + 6,4 = 124,8(g)

\(a.n_{CO_2}=\dfrac{4,4}{44}=0,1\left(mol\right);n_{O_2}=\dfrac{0,6.10^{23}}{6.10^{23}}=0,1\left(mol\right)\\ V_{hh}=\left(0,5+1,5+0,1+0,1\right).22,4=49,28\left(l\right)\\ b.m_{hh}=0,5.28+1,5.2+4,4+0,1.32=24,6\left(g\right)\)

a, V_{N\(_2\)} ( đktc ) = 0,5 . 22,4 = 11,2 lít

V_{H\(_2\)}  = 1,5 . 22,4 = 33,6 lít

\(n_{CO_2}=\dfrac{4,4}{44}=0,1\) ( mol )

=> \(V_{CO_2}=0,1.22,4=2,24\) ( lít )

\(n_{O_2}=\dfrac{0,6.10^{23}}{6.10^{23}}=0,1\) ( mol )

=> V_{\(O_2\)} = 0,1 .22,4 = 2,24 lít

=> V_hh = 11,2 + 33,6 + 2,24 + 2,24 = 49,28 lít

b, \(m_{N_2}=0,5.28=14\) ( g )

\(m_{H_2}=1,5.2=3\) ( g )

\(m_{CO_2}=0,1.44=4,4\) ( g )

\(m_{O_2}=0,1.32=3,2\) (g)

\(m_{hh}=14+3+4,4+3,2=24,6\) ( g )

\(n_{SO_2}=\dfrac{6,4}{64}=0,1mol\)

\(n_{H_2}=\dfrac{1,2.10^{23}}{6.10^{23}}=0,2mol\)

\(\Rightarrow V_{hh}=\left(0,1+0,2+1,5+2,5\right).22,4=96,32l\)

\(m_{O_2}=1,5.32=48g\)

\(m_{N_2}=2,5.28=70g\)

\(m_{H_2}=0,2.2=0,4g\)

=> \(m_{hh}=48+70+0,4+6,4==124,8g\)