a) \(M_X=19.2=38\left(g/mol\right)\)

`=>` \(d_{X/kk}=\dfrac{38}{29}=1,310345\)

b) \(m_X=0,4.38=15,2\left(g\right)\)

Gọi \(\left\{{}\begin{matrix}n_{O_2}=x\left(mol\right)\\n_{CO_2}=y\left(mol\right)\end{matrix}\right.\)

`=>` \(\left\{{}\begin{matrix}32x+44y=15,2\\x+y=0,4\end{matrix}\right.\Leftrightarrow x=y=0,2\)

\(m_Y=0,1.28+15,2=18\left(g\right)\)

`=>` \(\left\{{}\begin{matrix}\%m_{N_2}=\dfrac{0,1.28}{18}.100\%=15,56\%\\\%m_{O_2}=\dfrac{0,2.32}{18}.100\%=35,56\%\\\%m_{CO_2}=100\%-15,56\%-35,56\%=48,88\%\end{matrix}\right.\)

b) \(M_{hh}=4.10=40\left(g/mol\right)\)

Gọi \(n_{NO_2}=a\left(mol\right)\)

`=>` \(\left\{{}\begin{matrix}m_{hh}=18+46a\left(g\right)\\n_{hh}=0,5+0,1+a=0,6+a\left(mol\right)\end{matrix}\right.\)

`=>` \(M_{hh}=\dfrac{m_{hh}}{n_{hh}}=\dfrac{18+46a}{0,6+a}=40\)

`=> a = 1`

`=> V_{NO_2(đktc)} = 1.22,4 = 22,4 (l)`

a, m_X = 0,2.32 + 0,15.28 = 10,6 (g)

n_X = 0,2 + 0,15 = 0,35 (mol)

=> M_X = \(\dfrac{10,6}{0,35}=30,3\left(\dfrac{g}{mol}\right)\)

=> d_X/kk = \(\dfrac{30,3}{29}=1,05\)

b, m_Y = 0,5.44 + 2.2 = 26 (g)

n_Y = 0,5 + 2 = 2,5 (mol)

=> M_Y = \(\dfrac{26}{2,5}=10,4\left(\dfrac{g}{mol}\right)\)

=> d_Y/O2 = \(\dfrac{10,4}{32}=0,325\)

c, m_A = 17,75 + 8,4 = 26,15 (g)

n_A = \(\dfrac{17,75}{71}+\dfrac{8,4}{28}=0,55\left(mol\right)\)

=> M_A = \(\dfrac{26,15}{0,55}=47,6\left(\dfrac{g}{mol}\right)\)

=> d_A/CO2 = \(\dfrac{47,6}{44}=1,1\)

Mình làm mẫu 3 ý đầu rồi mấy ý sau bạn tự làm nhé

bạn là chó đúng ko?

\(a.\)

\(m_{hh}=m_{SO_2}+m_{CO_2}=0.15\cdot64+0.2\cdot44=18.4\left(g\right)\)

\(n_{hh}=0.15+0.2=0.35\left(mol\right)\)

\(\overline{M}_X=\dfrac{m_{hh}}{n_{hh}}=\dfrac{18.4}{0.35}=52.5\left(\dfrac{g}{mol}\right)\)

\(b.\)

\(d_{X\text{/}NO_2}=\dfrac{52.57}{46}=1.14\)

\(a.\)

\(n_{hh}=0.2+0.15+0.1=0.45\left(mol\right)\)

\(V_X=0.45\cdot22.4=10.08\left(l\right)\)

\(b.\)

\(m_X=0.2\cdot28+0.15\cdot71+0.1\cdot32=19.45\left(g\right)\)

\(c.\)

\(\overline{M}_X=\dfrac{19.45}{0.45}=43.22\left(g\text{/}mol\right)\)

\(d.\)

\(d_{X\text{/}kk}=\dfrac{43.22}{29}=1.4\)

Nặng hơn không khí 1.4 lần

Đặt \(n_{O_2}=x;n_{CO_2}=y\)

\(n_X=\dfrac{4,48}{22,4}=0,2\left(mol\right)\Leftrightarrow x+y=0,2\) 

Ta có: \(16x+44y=\left(x+y\right).18.2\)

     \(\Leftrightarrow2y=5x\)

     \(\Leftrightarrow\dfrac{y}{5}=\dfrac{x}{2}\)

Mà x+y=0,2

\(\Rightarrow\dfrac{y}{5}=\dfrac{x}{2}=\dfrac{x+y}{5+2}=\dfrac{0,2}{7}=0,0286\)

\(\Rightarrow y=5.0,0286=0,143\left(mol\right);x=0,2-0,143=0,057\left(mol\right)\)

Mình làm mẫu một ý nha:

a, Gọi hh SO₂ và H₂ là X; O₂ và N₂ là Y

\(\Rightarrow\left\{{}\begin{matrix}\left\{{}\begin{matrix}m_X=0,02.64+0,5.2=2,28\left(g\right)\\n_X=0,02+0,5=0,52\left(mol\right)\end{matrix}\right.\\\left\{{}\begin{matrix}m_Y=0,2.32+0,5.28=20,4\left(g\right)\\n_Y=0,2+0,5=0,7\left(mol\right)\end{matrix}\right.\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}M_X=\dfrac{2,28}{0,52}=4,4\left(\dfrac{g}{mol}\right)\\M_Y=\dfrac{20,4}{0,7}=29,1\left(\dfrac{g}{mol}\right)\end{matrix}\right.\)

\(\Rightarrow d_{X/Y}\)\(=\dfrac{4,4}{29,1}=0,15\)

\(M_X=\dfrac{0,1.32+0,2.64}{0,1+0,2}=\dfrac{160}{3}\left(\dfrac{g}{mol}\right)\)

=> \(d_{\dfrac{X}{CH4}}=\dfrac{\dfrac{160}{3}}{16}=\dfrac{10}{3}\approx3,333\)