PT: \(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)

\(2H_2+O_2\underrightarrow{t^o}2H_2O\)

\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_{3\downarrow}+H_2O\)

Ta có: \(n_{CaCO_3}=\dfrac{30}{100}=0,3\left(mol\right)\)

Theo PT: \(n_{C_2H_4}=\dfrac{1}{2}n_{CO_2}=\dfrac{1}{2}n_{CaCO_3}=0,15\left(mol\right)\)

\(\Rightarrow V_{C_2H_4}=0,15.22,4=3,36\left(l\right)\)

\(V_{H_2}=5,6-3,36=2,24\left(l\right)\)

Gọi số mol của  CH 4  trong hỗn hợp là X, của  C 2 H 4  trong hỗn hợp là y.

Ta có hệ: x + y = 0,15 mol và y = x + 2y = n CO 2 = n CaCO 3  = 0,2 mol

⇒ x = 0,1; y = 0,05

⇒ % V C H 4  = 66,67% ; % V C 2 H 4  = 33,33%.

a)

$CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O$
$C_2H_4 + 3O_2 \xrightarrow{t^o} 2CO_2 + 2H_2O$

$CO_2 + Ba(OH)_2 \to BaCO_3 + H_2O$

b)

Gọi $n_{CH_4} = a(mol) ; n_{C_2H_4} = b(mol)$
$\Rightarorw a + b = \dfrac{1,68}{22,4} = 0,075(1)$

Theo PTHH : $n_{BaCO_3} = n_{CO_2} = a + 2b = \dfrac{19,7}{197} = 0,1(2)$
Từ (1)(2) suy ra : a = 0,05 ; b = 0,025

$\%V_{CH_4} = \dfrac{0,05}{0,075}.100\% = 66,67\%$

$\%V_{C_2H_4} = 100\% - 66,67\% = 33,33\%$

c) $n_{O_2} = 2n_{CH_4} + 3n_{C_2H_4} = 0,175(mol)$
$\Rightarrow V_{O_2} = 0,175.22,4 = 3,92(lít)$
$\Rightarrow V_{kk} = 5V_{O_2} = 19,6(lít)$

 Phần 1:

2CO + O2 -to> 2CO2

2H2 + O2 -to> 2H2O

Dẫn sản phẩm qua nước vôi trong 

CO2 + Ca(OH)2 -> CaCO3 + H2O

-> mCaCO3=20 gam -> nCaCO3=nCO2=0,2 mol=nCO

PHần 2:

CuO + CO -to> Cu + CO2

CuO + H2 -to> Cu + H2O

Ta có: nCu=19,2/64=0,3 mol=nCO +nH2

Mà nCO=0,2 mol -> nH2=0,1 mol

-> hỗn hợp ban đầu chứa 0,4 mol CO và 0,2 mol H2

-> n hỗn hợp=0,4+0,2=0,6 mol -> V hỗn hợp=0,6.22,4=13,44 lít

Ta có: % thể tích= % số mol

->% V CO=\(\dfrac{0,4}{0,6}\)=66,67% ->% V H2=33,33%

m hỗn hợp=0,4.28+0,2.2=11,6 gam

-> % mCO=\(\dfrac{0,4.28}{11,6}\)=96,55% ->%mH2=3,45%

\(n_{CaCO_3}=\dfrac{20}{100}=0,2mol\)

\(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)

                     0,2         0,2                        ( mol )

\(CH_4+2O_2\rightarrow\left(t^o\right)CO_2+2H_2O\)

0,2                           0,2                  ( mol )

\(n_{hh}=\dfrac{6,7}{22,4}=0,299mol\)

\(\%V_{CH_4}=\dfrac{0,2}{0,229}.100=87,33\%\)

\(\%V_{C_2H_4}=100\%-87,33\%=12,67\%\)

\(a)\\ 2CO + O_2 \xrightarrow{t^o} 2CO_2\\ 2H_2 +O_2 \xrightarrow{t^o} 2H_2O\\ CO_2 + Ca(OH)_2 \to CaCO_3 + H_2O\\ CuO + CO \xrightarrow{t^o} Cu + CO_2\\ CuO + H_2 \xrightarrow{t^o} Cu + H_2O\\ \)

\(b) n_{CO_2} = n_{CaCO_3} = \dfrac{20}{100} = 0,2(mol)\\ n_{Cu} = n_{CO} + n_{H_2} = 0,2 + n_{H_2} = \dfrac{19,2}{64}=0,3(mol)\\ \Rightarrow n_{H_2} = 0,3 -0,2 = 0,1(mol)\\ \Rightarrow V = 2(0,2 + 0,1).22,4 = 13,44(lít)\\ c)\\ \)

\( \%V_{CO} = \dfrac{0,2}{0,2 + 0,1}.100\% = 66,67\%\\\%V_{H_2} = 100\%- 66,67\% = 33,33\%\\\%m_{CO} = \dfrac{0,2.28}{0,2.28+0,1.2}.100\% =96,55\%\\\%m_{H_2} = 100\%-96,55\% = 3,45\%\)

P1:

\(n_{BaCO_3}=n_{CO_2}=\dfrac{39.4}{197}=0.2\left(mol\right)\)

\(Ba\left(OH\right)_2+CO_2\rightarrow BaCO_3+H_2O\)

\(\Rightarrow n_{CO}=n_{CO_2}=0.2\left(mol\right)\)

P2:

\(n_{Fe}=\dfrac{16.8}{56}=0.3\left(mol\right)\)

\(Fe_2O_3+3CO\underrightarrow{^{^{t^0}}}2Fe+3CO_2\)

\(...........0.2...\dfrac{2}{15}\)

\(Fe_2O_3+3H_2\underrightarrow{^{^{t^0}}}2Fe+3H_2O\)

\(..........0.25.0.3-\dfrac{2}{15}\)

\(V_{hh}=\left(0.2+0.25\right)\cdot2\cdot22.4=20.16\left(l\right)\)

Đề thiếu !

Theo gt ta có: $n_{O_2}=0,6(mol);n_{hh}=0,25(mol)$

a, $CH_4+2O_2\rightarrow CO_2+2H_2O$

$C_2H_4+3O_2\rightarrow 2CO_2+2H_2O$

Gọi số mol CH4 và C2H4 lần lượt là a;b(mol)

Ta có: $a+b=0,25;2a+3b=0,6\Rightarrow a=0,15;b=0,1$

b, Suy ra $\%V_{CH_4}=60\%;\%V_{C_2H_4}=40\%$

c, Ta có: $n_{CaCO_3}=n_{CO_2}=0,15+0,1.2=0,35(mol)\Rightarrow m_{CaCO_3}=35(g)$

\(a)\\ CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O\\ C_2H_4 + 3O_2 \xrightarrow{t^o} 2CO_2 + 2H_2O\\ b)\ V_{CH_4} = a(lít) ; V_{C_2H_4} = b(lít)\\ \Rightarrow a + b = 5,6(1)\\ V_{O_2} = 2a + 3b = 13,44(2)\\ (1)(2)\Rightarrow a = 3,36 ; b = 2,24\\ \%V_{CH_4} = \dfrac{3,36}{5,6}.100\% = 60\%\\ \%V_{C_2H_4} = 40\%\\ c) V_{CO_2} = a + 2b = 7,84(lít)\\\)

\(CO_2 + Ca(OH)_2 \to CaCO_3 + H_2O\\ n_{CaCO_3} = n_{CO_2} = \dfrac{7,84}{22,4} = 0,35(mol)\\ \Rightarrow m_{CaCO_3} = 0,35.100 = 35(gam)\)

a, PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

\(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)

b, Giả sử: \(\left\{{}\begin{matrix}n_{CH_4}=x\left(mol\right)\\n_{C_2H_4}=y\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow x+y=\dfrac{5,6}{22,4}=0,25\left(1\right)\)

Ta có: \(n_{O_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)

Theo PT: \(n_{O_2}=2n_{CH_4}+3n_{C_2H_4}=2x+3y\)

⇒ 2x + 3y = 0,6 (2)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,15\left(mol\right)\\y=0,1\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,15}{0,25}.100\%=60\%\\\%V_{C_2H_4}=40\%\end{matrix}\right.\)

b, Theo PT: \(n_{CO_2}=n_{CH_4}+2n_{C_2H_4}=0,35\left(mol\right)\)

PT: \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_{3\downarrow}+H_2O\)

Theo PT: \(n_{CaCO_3}=n_{CO_2}=0,35\left(mol\right)\)

\(\Rightarrow m_{CaCO_3}=0,35.100=35\left(g\right)\)

Bạn tham khảo nhé!

\(CH_4+2O_2\underrightarrow{^{t^0}}CO_2+2H_2O\)

\(C_2H_4+3O_2\underrightarrow{^{t^0}}2CO_2+2H_2O\)

\(n_{CH_4}=a\left(mol\right),n_{C_2H_4}=b\left(mol\right)\)

\(n_{hh}=\dfrac{2.24}{22.4}=0.1\left(mol\right)\)

\(\Rightarrow a+b=0.1\left(1\right)\)

\(n_{BaCO_3}=\dfrac{27.58}{197}=0.14\left(mol\right)\)

\(\Rightarrow n_{CO_2}=0.14\left(mol\right)\)

\(\Rightarrow a+2b=0.14\left(2\right)\)

\(\left(1\right),\left(2\right):a=0.06,b=0.04\)

\(\%V_{CH_4}=\dfrac{0.06}{0.1}\cdot100\%=60\%\)

\(\%V_{C_2H_4}=40\%\)