\(n_{O_2}=2a\left(mol\right),n_{N_2}=3a\left(mol\right),n_{SO_2}=4a\left(mol\right)\)

\(n_{hh}=2a+3a+4a=9a\left(mol\right)\)

\(\Rightarrow9a=\dfrac{5.4\cdot10^{23}}{6\cdot10^{23}}=0.9\)

\(\Rightarrow a=9\)

\(V_{hh}=0.9\cdot22.4=20.16\left(l\right)\)

\(m_{hh}=0.2\cdot32+0.3\cdot28+0.4\cdot64=40.4\left(g\right)\)

Giả sử có 1 mol khí Cl₂, 2 mol khí O₂

a) \(\left\{{}\begin{matrix}\%V_{Cl_2}=\dfrac{1}{1+2}.100\%=33,33\%\\\%V_{O_2}=\dfrac{2}{1+2}.100\%=66,67\%\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%m_{Cl_2}=\dfrac{1.71}{1.71+2.32}.100\%=52,59\%\\\%m_{O_2}=\dfrac{2.32}{1.71+2.32}.100\%=47,41\%\end{matrix}\right.\)

b) \(\overline{M}=\dfrac{1.71+2.32}{1+2}=45\left(g/mol\right)\)

=> \(d_{A/H_2}=\dfrac{45}{2}=22,5\)

c) \(n_A=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

=> m_A = 0,3.45 = 13,5 (g)

Em tách bài ra nha 1-2 bài/1 câu hỏi để nhận được hỗ trợ nhanh nhất nha.

a) \(\left\{{}\begin{matrix}n_{Cl_2}+n_{O_2}=\dfrac{6,72}{22,4}=0,3\\\overline{M}=\dfrac{71.n_{Cl_2}+32.n_{O_2}}{n_{Cl_2}+n_{O_2}}=2.29=58\end{matrix}\right.\)

=> \(\left\{{}\begin{matrix}n_{Cl_2}=0,2\left(mol\right)\\n_{O_2}=0,1\left(mol\right)\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%V_{Cl_2}=\dfrac{0,2}{0,3}.100\%=66,67\%\\\%V_{O_2}=\dfrac{0,1}{0,3}.100\%=33,33\%\end{matrix}\right.\)

b) \(\left\{{}\begin{matrix}m_{Cl_2}=0,2.71=14,2\left(g\right)\\m_{O_2}=0,1.32=3,2\left(g\right)\end{matrix}\right.\)

a. Gọi x, y lần lượt là số mol của CH₄ và CO₂

Ta có: \(n_A=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)

Theo đề, ta có:

- x + y = 0,4 (1)

- 16x + 44y = 9,2 (2)

Từ (1) và (2), ta có HPT: 

\(\left\{{}\begin{matrix}x+y=0,4\\16x+44y=9,2\end{matrix}\right.\)

Giải ra, ta được: 

 x = 0,3, y = 0,1

=> \(m_{CH_4}=0,3.16=4,8\left(g\right);m_{CO_2}=0,1.44=4,4\left(g\right)\)

b. Ta có: \(\overline{M_A}=\dfrac{4,8+4,4}{0,3+0,1}=23\left(g\right)\)

=> \(d_{\dfrac{A}{O_2}}=\dfrac{\overline{M_A}}{M_{O_2}}=\dfrac{23}{32}=0,71875\left(lần\right)\)

Bài 1:

a) \(V_{khí}=\left(0,2+0,5+0,35\right)\cdot22,4=23,52\left(l\right)\)

b) \(m_{khí}=0,2\cdot64+0,5\cdot28+0,35\cdot28=36,6\left(g\right)\)

Bài 2:

Sửa đề: Tỉ lệ \(Mg:C:O=2:1:4\)

Ta có: \(n_{Mg}:n_C:n_O=\dfrac{2}{24}:\dfrac{1}{12}:\dfrac{4}{16}=1:1:3\)

\(\Rightarrow\) CTHH là MgCO₃

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

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

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