Bài 5:

\(m_{Y}=m_{SO_2}+m_{CH_4}=\dfrac{3,36}{22,4}.64+\dfrac{13,44}{22,4}.16=19,2(g)\)

Bài 6:

\(V_{CO_2}=0,15.22,4=3,36(l)\\ V_{NO_2}=0,2.22,4=4,48(l)\\ V_{SO_2}=0,02.22,4=0,448(l)\\ V_{N_2}=0,03.22,4=0,672(l)\)

a) nNaOH=20/40=0,5(mol)

nN2=1,12/22,4=0,05(mol)

nNH3= (0,6.10²³)/(6.10²³)=0,1(mol)

b) mAl2O3= 102.0,15= 15,3(g)

mSO2= nSO2 . M(SO2)= V(CO2,đktc)/22,4 . 64= 6,72/22,4. 64= 0,3. 64= 19,2(g)

mH2S= nH2S. M(H2S)= (0,6.10²³)/(6.10²³) . 34=0,1. 34 = 3,4(g)

c) V(CO2,đktc)=0,2.22.4=4,48(l)

nSO2=16/64=0,25(mol) -> V(SO2,đktc)=0,25.22,4=5,6(l)

nCH4=(2,1.10²³)/(6.10²³)=0,35(mol) -> V(CH4,đktc)=0,35.22,4=7,84(l)

a,n=m/M=20/(23+17)20:40=0,5(mol)

n=V/22,4=11,2/22,4=0,5(mol)

n=số pt/số Avogađro=6.10^23:6.10^23=1

n _NO2=4,6\46=0,1 mol

=>VNO2=0,1.22,4=2,24l

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

Gọi: \(\left\{{}\begin{matrix}n_{H_2}=x\left(mol\right)\\n_{CO_2}=y\left(mol\right)\end{matrix}\right.\) ⇒ x + y = 0,4 (mol) (1)

\(d_{X/NO_2}=0,5\Rightarrow M_X=0,5.46=23\left(g/mol\right)\)

⇒ m_X = 0,4.23 = 9,2 (g)

⇒ 2x + 44y = 9,2 (2)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,2\left(mol\right)\\y=0,2\left(mol\right)\end{matrix}\right.\)

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

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

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

\(a,n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

\(n_{CO_2}=0,5.44=11\left(g\right)\)

\(b,n_{NH_3}=\dfrac{10,08}{22,4}=0,45\left(mol\right)\)

\(n_{NH_3}=0,45,17=7,65\left(g\right)\)

\(c,n_{NO_2}=\dfrac{16,8}{22,4}=0,75\left(mol\right)\)

\(n_{NO_2}=0,75.46=34,5\left(g\right)\)

\(a,n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\\ m_{CO_2}=0,25\cdot44=11\left(g\right)\\ b,n_{NH_3}=\dfrac{10,08}{22,4}=0,45\left(mol\right)\\ m_{NH_3}=0,45\cdot17=7,65\left(g\right)\\ c,n_{NO_2}=\dfrac{16,8}{22,4}=0,75\left(mol\right)\\ m_{NO_2}=0,75\cdot46=34,5\left(g\right)\)

Chọn A

Không thể nhận biết NaHSO₄ và H₂SO₄ vì không đun nóng thì không thể nhận ra ion Na⁺

Đáp án A. 0,9823