a)

$n_{Cl_2} :  n_{O_2} = 1 : 2$

Suy ra : 

$\%V_{Cl_2} = \dfrac{1}{1 + 2}.100\% = 33,33\%$
$\%V_{O_2} = \dfrac{2}{1 + 2}.100\% = 66,67\%$

b)

Coi $n_{Cl_2} = 1 (mol) \Rightarrow n_{O_2} = 2(mol)$
$\%m_{Cl_2} = \dfrac{1.71}{1.71 + 2.32}.100\% = 52,59\%$
$\%m_{O_2} = 100\% -52,59\% = 47,41\%$

c)

$M_A = \dfrac{71.1 + 32.2}{1 + 2} = 45(g/mol)$
$d_{A/B} = \dfrac{45}{28} = 1,607$

Gọi \(\left\{{}\begin{matrix}n_{SO_2}=a\left(mol\right)\\n_{SO_3}=b\left(mol\right)\end{matrix}\right.\)

\(d_A\)_/O2=2,25\(\Rightarrow M_A=72đvC\)

\(\Rightarrow\dfrac{64a+80b}{a+b}=72\)

\(\Rightarrow64a+80b=72a+72b\)

\(\Rightarrow a=b\)

\(\%V_{SO_2}=\%V_{SO_3}=\dfrac{a}{a+b}\cdot100\%=50\%\)

\(\%m_{SO_2}=\dfrac{64a}{64a+80b}\cdot100\%=\dfrac{64a}{64a+80b}\cdot100\%=44,44\%\)

\(\%m_{SO_3}=100\%-44,44\%=55,56\%\)

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

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

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

a. %V (ở cùng điều kiện) cũng là %n

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

a)

Gọi \(n_{SO_2} = n_{CO_2} = a(mol)\\ n_{CO} = b(mol)\)

Ta có : 

\(M_A = \dfrac{m_{CO}+m_{CO_2} + m_{SO_2}}{n_{CO} + n_{CO_2} + n_{SO_2}}\)

⇔ \(\dfrac{28b+ 44a + 64a}{b + a + a} = 20,5.2\)

⇔ 108a + 28b = 41b + 82a

⇔ 26a = 13b

⇔ \(\dfrac{a}{b} = \dfrac{13}{26} = \dfrac{1}{2}\)

Suy ra : Nếu thể tích khí A được chia làm 4 phần thì CO chiếm 2 phần , CO₂ và SO₂ chiếm 1 phần

\(\%V_{CO_2} = \%V_{SO_2} = \dfrac{1}{4}.100\% = 25\%\\ \%V_{SO_2} = \dfrac{2}{4}.100\% = 50\%\)

b)

Ta có : 

\(n_{CO_2} + n_{SO_2} = n_A.50\% = \dfrac{2,24}{22,4}.50\% = 0,05(mol)\)

\(2NaOH + CO_2 \to Na_2CO_3 + H_2O\\ 2NaOH + SO_2 \to Na_2SO_3 + H_2O\)

Theo PTHH : 

\(n_{NaOH} = 2(n_{SO_2} + n_{CO_2}) = 0,1(mol)\\ \Rightarrow V_{NaOH} = \dfrac{0,1}{1} = 0,1(lít)\)

\(n_{SO_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\\ n_{O_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\\ n_{hh}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

Gọi \(n_{SO_3}=a\left(mol\right)\)

PTHH: 2SO₂ + O₂ --t^o--> 2SO₃

              a <----- 0,5a <--- a

\(\rightarrow0,2-a+0,1-a+a=0,25\Leftrightarrow a=0,05\left(mol\right)\)

\(\rightarrow\left\{{}\begin{matrix}V_{O_2}=\left(0,1-0,05\right).22,4=1,12\left(l\right)\\V_{SO_2}=\left(0,2-0,05\right).22,4=3,36\left(l\right)\\V_{SO_3}=0,05.22,4=1,12\left(l\right)\end{matrix}\right.\)

\(H=\dfrac{0,05}{0,2}=25\%\)