nCO2= 8,96/22,4= 0,4(mol))

nO2= \(\frac{6.10^{22}}{6.10^{23}}=0,1\left(mol\right)\)

\(\overline{M_{hhX}}=\frac{0,4.44+0,1.32}{0,4+0,1}=41,6\left(\frac{g}{mol}\right)\\ \rightarrow d_{hhX}=\frac{41,6}{29}\approx1,434\left(lần\right)\)

\(\%H_2=100-20-30=50\%\)

\(GS:n_Z=1\left(mol\right)\)

\(\Rightarrow n_{H_2}=0.5\left(mol\right),n_{CO_2}=0.2\left(mol\right),n_{H_2S}=0.3\left(mol\right)\)

\(\overline{M}=\dfrac{0.5\cdot2+0.2\cdot44+0.3\cdot34}{1}=20\left(\dfrac{g}{mol}\right)\)

\(d_{\dfrac{Z}{kk}}=\dfrac{20}{29}=0.7\)

Z nhẹ hơn không khí 0.7 (lần) 

\(b.\)\(n_{O_2}=\dfrac{9.6}{32}=0.3\left(mol\right)\)

\(\Rightarrow n_Z=0.3\left(mol\right)\)

\(m_Z=\overline{M}\cdot n=20\cdot0.3=6\left(g\right)\)

Khối lượng mol trung bình của khí A là:

\(M_{hh}=\dfrac{m_{hh}}{n_{hh}}=\dfrac{m_{SO2}+m_{H2}+m_{CO2}}{n_{SO4}+n_{H2}+n_{CO2}}\)

\(=\dfrac{0,8.64+0,5.2+0,6.44}{0,8+0,5+0,6}=\dfrac{78,6}{1,9}=41,36\left(g/mol\right)\)

\(\Rightarrow d_{A/KK}=\dfrac{M_A}{M_{KK}}=\dfrac{41,36}{29}=1,42\)

Vậy khí A nặng hơn không khí 1,42 lần.

dgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgdgx

a) Gọi \(\left\{{}\begin{matrix}n_{O_2}=a\left(mol\right)\\n_{SO_2}=b\left(mol\right)\end{matrix}\right.\)

=> \(\left\{{}\begin{matrix}a+b=\dfrac{17,92}{22,4}=0,8\\32a+64b=32\end{matrix}\right.\)

=> \(\left\{{}\begin{matrix}a=0,6\left(mol\right)\\b=0,2\left(mol\right)\end{matrix}\right.\)

b) \(\left\{{}\begin{matrix}\%V_{O_2}=\dfrac{0,6}{0,8}.100\%=75\%\\\%V_{SO_2}=\dfrac{0,2}{0,8}.100\%=25\%\end{matrix}\right.\)

c) \(\overline{M}_X=\dfrac{32}{0,8}=40\left(g/mol\right)\)

Xét \(d_{X/kk}=\dfrac{40}{29}=1,379\)

=> X nặng hơn không khí 1,379 lần

d) Gọi số mol N₂ thêm vào là x (mol)

\(\overline{M}_Y=\dfrac{32+28x}{0,8+x}=18,8.2=37,6\left(g/mol\right)\)

=> x = 0,2 (mol)

=> \(m_{N_2}=0,2.28=5,6\left(g\right)\)

\(\dfrac{O_2}{CO_2}=\dfrac{16\cdot2}{12+16\cdot2}=\dfrac{8}{11}\)

Phân tử Oxi nhẹ hơn hơn phân tử CO2 \(\dfrac{8}{11}\left(lan\right)\)

Ta có: \(M_{O_2}=32đvC\)

\(M_{CO_2}=44đvC\)

O₂ nhẹ hơn CO₂ và bằng \(\dfrac{32}{44}=0,73\) lần CO₂