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

Ta có: \(n_{Br_2}=\dfrac{16}{160}=0,1\left(mol\right)=n_{C_2H_4}\)

\(\Rightarrow\%V_{C_2H_4}=\dfrac{0,1\cdot22,4}{8,96}=25\%\) \(\Rightarrow\%V_{CH_4}=75\%\)

ta có :

nBr2=\(\dfrac{16}{160}=0,1mol\)

C2H4+Br2->C2H4Br2

0,1------0,1

=>VC2H4=0,1.22,4=2,24l

=>VCH4=3,36l->n CH4=0,15 mol

->%VC2H4=\(\dfrac{2,24}{5,6}.100\)=40%

=>%VCH4=60%

c)

CH4+2O2-to>CO2+2H2O

0,15---------------0,15

C2H4+3O2--to>2CO2+2H2O

0,1--------------------0,2
=>m CaCO3=0,35.100=35g

Ai giúp e với ạ

Ta có: \(n_{Br_2}=\dfrac{48}{160}=0,3\left(mol\right)\)

PT: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

____0,15___0,3 (mol)

\(\Rightarrow\left\{{}\begin{matrix}V_{C_2H_2}=0,15.22,4=3,36\left(l\right)\\V_{CH_4}=2,24\left(l\right)\end{matrix}\right.\)

Bạn tham khảo nhé!

$C_2H_2+2Br_2\to Br_2CH-CHBr_2$

$n_{Br_2}=\dfrac{48}{160}=0,3(mol)$

$\Rightarrow n_{C_2H_2}=\dfrac{n_{Br_2}}{2}=0,15(mol)$

$\Rightarrow V_{C_2H_2}=0,15.22,4=3,36(l)$

$\Rightarrow V_{CH_4}=5,6-3,36=2,24(l)$

a, Cho hỗn hợp khí CH₄ và C₂H₄ qua dung dịch Br₂ dư chỉ có C₂H₄ tham gia phản ứng. PTHH: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

b, \(n_{Br_2}=\dfrac{m_{Br_2}}{M_{Br_2}}=\dfrac{64}{160}=0,4(mol)\)

Theo PTHH: \(n_{C_2H_4}=n_{Br_2}=0,4(mol)\)

\(V_{C_2H_4}=n_{C_2H_4}.22,4=0,4.22,4=8,96(l)\)

Phần trăm của khí C₂H₄ trong hỗn hợp ban đầu là: \(\%V_{C_2H_4}=\dfrac{V_{C_2H_4}}{V_hh}.100\%=\dfrac{8,96}{11,2}.100\%=80\%\)

Phần trăm của khí CH₄ trong hỗn hợp ban đầu là: 

\(\%V_{CH_4}=100\%-\%V_{C_2H_4}=100\%-80\%=20\%\)

?? số liệu

\(n_{Br_2}=\dfrac{4}{160}=0,025\left(mol\right);n_{hh}=\dfrac{2,8}{22,4}=0,125\left(mol\right)\)

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

            0,025<-0,125

\(\Rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,025}{0,125}.100\%=20\%\\\%V_{CH_4}=100\%-20\%=80\%\end{matrix}\right.\)

Đặt `n_{CH_4}=x(mol);n_{C_2H_4}=y(mol);n_{H_2}=z(mol)`

`->x+y+z={3,36}/{22,4}=0,15(1)`

`C_2H_4+Br_2->C_2H_4Br_2`

`->m_{C_2H_4}=m_{\text{bình tăng}}=0,84(g)`

`->28y=0,84`

`->y=0,03(2)`

`M_A={0,975}/{{1,4}/{22,4}}=15,6(g//mol)`

`->m_A=15,6.0,15=2,34=16x+28y+2z(3)`

`(1)(2)(3)->x=0,09(mol);y=z=0,03(mol)`

Vậy trong hỗn hợp đầu:

`V_{H_2}=V_{C_2H_4}=0,03.22,4=0,672(l)`

`V_{CH_4}=0,09.22,4=2,016(l)`