\(n_{hh}=6,72:22,4=0,3mol\\ C_2H_2+2Br_2->C_2H_2Br_4\\ C_2H_4+Br_2->C_2H_2Br_2\\ n_{Br_2}=0,4mol\\ n_{C_2H_2}=a;n_{C_2H_4}=b\\ a+b=0,3\\ 2a+b=0,4\\ a=0,2;b=0,1\\ \%V_{C_2H_2}=\dfrac{0,2}{0,3}.100\%=66,67\%\\ \%V_{C_2H_4}=33,33\%\)

1/2 hỗn hợp có 0,1 mol C2H2 và 0,05mol C2H4

\(BT.C:n_{CO_2}=2n_{C_2H_2}+2n_{C_2H_4}=0,3mol\\ n_{CaCO_3}=n_{CO_2}=0,3\\ m_{KT}=0,3.100=30g\)

a, \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

b, - Khí thoát ra là CH₄ ⇒ V_CH4 = 6,72 (l)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{6,72}{13,44}.100\%=50\%\\\%V_{C_2H_2}=50\%\end{matrix}\right.\)

a. PTHH: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

a. Vì CH₄ không phản ứng với dd Br₂ nên

       \(V_{CH_4}=6,72\left(l\right)\)

\(\%V_{CH_4}=\dfrac{6,72}{13,44}x100\%=50\%\)

\(\%V_{C_2H_2}=100\%-50\%=50\%\)

a, \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

b, CH₄ không pư với Br₂ nên khí thoát ra là CH₄.

⇒ V_CH4 = 6,72 (l)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{6,72}{8,96}.100\%=75\%\\\%V_{C_2H_2}=100-75=25\%\end{matrix}\right.\)

a) Khi cho metan và axetilen qua dung dịch brom thì metan không phản ứng với brom nên thoát ra khỏi bình còn axetilen phản ứng với dung dịch brom.

=> 20,16 lít khí thoát là metan CH₄

=> V axetilen = 40,32 - 20,16 = 20,16 lít 

<=> %V _CH4  = %V C₂H₂ = 50%

b)

nCH₄ = nC₂H₂ = \(\dfrac{20,16}{22,4}\)= 0,9 lít

CH₄  +  2O₂ → CO₂  +  2H₂O

C₂H₂  +  \(\dfrac{5}{2}\)O₂   →  2CO₂  + H₂O

Theo tỉ lệ phản ứng cháy => nO₂ cần để đốt cháy hết hỗn hợp khí = 2nCH₄+\(\dfrac{5}{2}\)nC₂H₂= 4,05 mol.

=> V O₂ cần dùng = 4,05.22,4 = 90,72 lít

a.\(n_{hh}=\dfrac{13,44}{22,4}=0,6mol\)

\(n_{C_2H_2Br_4}=\dfrac{6,72}{22,4}=0,3mol\)
\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

 0,3                         0,3      ( mol )

\(\%C_2H_2=\dfrac{0,3}{0,6}.100=50\%\)

\(\%CH_4=100\%-50\%=50\%\)

b.

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

 0,3       0,6                                       ( mol )

\(2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\)

 0,3          0,75                                        ( mol )

\(V_{O_2}=\left(0,6+0,75\right).22,4=1,35.22,4=30,24l\)

\(Đặt:n_{CH_4}=a\left(mol\right),n_{C_2H_2}=b\left(mol\right)\)

\(n_{hh}=a+b=0.35\left(mol\right)\left(1\right)\)

\(BTC:\)

\(a+2b=0.6\)

\(a=1\)

\(b=0.25\)

\(\%CH_4=\dfrac{0.1}{0.35}\cdot100\%=28.57\%\)

\(\%C_2H_2=71.43\%\)

\(\left\{{}\begin{matrix}n_{CH_4}=x\left(mol\right)\\n_{C_2H_2}=y\left(mol\right)\end{matrix}\right.\)⇒ x + y = \(\dfrac{7,84}{22,4} = 0,35(mol)\)

\(CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O\\ C_2H_2 + \dfrac{5}{2}O_2 \xrightarrow{t^o} 2CO_2 + H_2O\\ CO_2 + Ca(OH)_2 \to CaCO_3 + H_2O\)

Theo PTHH : x + 2y = \(\dfrac{60}{100} = 0,6(2)\)

Từ (1)(2) suy ra x = 0,1 ; y = 0,25

Vậy : 

\(\%V_{CH_4} = \dfrac{0,1}{0,35}.100\% = 28,57\%\\ \%V_{C_2H_2} = 100\% - 28,57\% = 71,43\%\)

1.Khí thoát ra là CH4 nCH4=0,1 mol mà tổng n khí=0,15 mol

=>nC2H2=0,05 mol

C2H2+2Br2 =>C2H2Br4

%VCH4=0,1/0,15.100%=66,67%

%VC2H2=33,33%

CH4+2O2=>CO2+2H2O

C2H2+5/2O2=>2CO2+H2O

Tổng mol O2=0,1.2+0,05.2,5=0,325 mol

=>VO2=0,325.22,4=7,28l

=>Vkk=7,28/20%=36,4lít

2.

C2H2        +2Br2=>C2H2Br4

0,025 mol<=0,05 mol

CH4+2O2=>CO2+2H2O
nCaCO3=nCO2=0,15 mol=>nCH4=0,15 mol

nBr2=8/160=0,05 mol=>nC2H2=0,025 mol

%VCH4=0,15/0,175.100%=85,71%

%VC2H2=14,29%
3.

nCO2=11,2/22,4=0,5 mol

C6H12O6=>2C2H5OH +2CO2

0,25 mol<=0,5 mol<=0,5 mol

mC2H5OH=0,5.46=23g

nC6H12O6=(0,5/2)/80%=0,3125 mol

=>m glucozo bđ=0,3125.180=56,25g

\(a,n_{hhkhí\left(C_2H_4,C_2H_2\right)}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\\ n_{Br_2}=\dfrac{80}{160}=0,5\left(mol\right)\\ Gọi\left\{{}\begin{matrix}n_{C_2H_4}=a\left(mol\right)\\n_{C_2H_2}=b\left(mol\right)\end{matrix}\right.\\ PTHH:C_2H_4+Br_2\rightarrow C_2H_4Br_2\\ Mol:a\rightarrow a\\ C_2H_2+2Br_2\rightarrow C_2H_2Br_4\\ Mol:b\rightarrow2b\\ Hệ.pt\left\{{}\begin{matrix}a+b=0,3\\a+2b=0,5\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}a=0,1\left(mol\right)\\b=0,2\left(mol\right)\end{matrix}\right.\\ \%V_{C_2H_4}=\dfrac{0,1}{0,3}=33,33\%\\ \%V_{C_2H_2}=100\%-33,335=66,67\%\)

\(b,PTHH:\\ C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\\ Mol:0,1\rightarrow0,3\rightarrow0,2\\ 2C_2H_2+5O_2\underrightarrow{t^o}4CO_2+2H_2O\\ Mol:0,2\rightarrow0,25\rightarrow0,4\\ n_{CO_2}=0,2+0,4=0,6\left(mol\right)\\ PTHH:Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\\ Mol:0,6\rightarrow0,6\rightarrow0,6\\ m_{CaCO_3}=0,6.100=60\left(g\right)\)

PTHH: \(CH_4+2O_2\xrightarrow[]{t^o}CO_2+2H_2O\)

Ta có: \(n_{CO_2}=\dfrac{1,68}{22,4}=0,075\left(mol\right)=n_{CH_4}\)

Đặt \(\left\{{}\begin{matrix}n_{C_2H_4}=a\left(mol\right)\\n_{C_2H_2}=b\left(mol\right)\end{matrix}\right.\) \(\Rightarrow a+b=\dfrac{5,04}{22,4}-0,075=0,15\)  (1)

PTHH: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

            \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

Theo PTHH: \(28a+26b=4,1\)  (2)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}a=n_{C_2H_4}=0,1\left(mol\right)\\b=n_{C_2H_2}=0,05\left(mol\right)\end{matrix}\right.\)

Mặt khác: \(n_{hh}=\dfrac{5,04}{22,4}=0,225\left(mol\right)\) \(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,075}{0,225}\cdot100\%\approx33,33\%\\\%V_{C_2H_4}=\dfrac{0,1}{0,225}\cdot100\%\approx44,44\%\\\%V_{C_2H_2}=22,23\%\end{matrix}\right.\)

a, \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

Ta có: \(n_{Br_2}=\dfrac{64}{160}=0,4\left(mol\right)\)

Theo PT: \(n_{C_2H_2}=\dfrac{1}{2}n_{Br_2}=0,2\left(mol\right)\)

Mà: \(n_X=\dfrac{10,08}{22,4}=0,45\left(mol\right)\Rightarrow n_{CH_4}=0,25\left(mol\right)\)

\(\Rightarrow V_{CH_4}=0,25.22,4=5,6\left(l\right)\)

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

\(2C_2H_2+5O_2\underrightarrow{t^o}4CO_2+2H_2O\)

Theo PT: \(n_{CO_2}=n_{CH_4}+2n_{C_2H_2}=0,65\left(mol\right)\)

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

Theo PT: \(n_{CaCO_3}=n_{CO_2}=0,65\left(mol\right)\Rightarrow m_{CaCO_3}=0,65.100=65\left(g\right)\)