1. \(n_{Br_2}=0,4.0,5=0,2\left(mol\right)\)

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

Theo PT: \(n_{C_2H_4}=n_{Br_2}=0,2\left(mol\right)\Rightarrow V_{C_2H_4}=0,2.22,4=4,48\left(l\right)\)

2. \(n_{C_2H_4Br_2}=\dfrac{9,4}{188}=0,05\left(mol\right)\)

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

Theo PT: \(n_{C_2H_4}=n_{C_2H_4Br_2}=0,05\left(mol\right)\)

\(\Rightarrow\%V_{C_2H_4}=\dfrac{0,05.22,4}{1,4}.100\%=80\%\)

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

giups mình với

?? số liệu

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

a, \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

b, \(n_{Br_2}=\dfrac{16}{160}=0,1\left(mol\right)\)

\(n_{C_2H_4}=n_{Br_2}=0,1\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,1.22,4}{3,36}.100\%\approx66,67\%\\\%V_{CH_4}\approx33,33\%\end{matrix}\right.\)

a, Ta có: \(n_{CH_4}+n_{C_2H_4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\left(1\right)\)

\(16n_{CH_4}+28n_{C_2H_4}=3\left(2\right)\)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{CH_4}=0,1\left(mol\right)\\n_{C_2H_4}=0,05\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}\%m_{CH_4}=\dfrac{0,1.16}{3}.100\%\approx53,33\%\\\%m_{C_2H_4}\approx46,67\%\end{matrix}\right.\)

- Ở cùng điều kiện nhiệt độ và áp suất, % số mol cũng là %V.

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,1}{0,15}.100\%\approx66,67\%\\\%V_{C_2H_4}\approx33,33\%\end{matrix}\right.\)

b, PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

Có: m _tăng = m_C2H4 = 0,05.28 = 1,4 (g)

a) \(n_{hh}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

Gọi \(\left\{{}\begin{matrix}n_{CH_4}=a\left(mol\right)\\n_{C_2H_4}=b\left(mol\right)\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}a+b=0,15\\16a+28b=3\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=0,1\\b=0,05\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,1}{0,15}.100\%=66,67\%\\\%V_{C_2H_4}=100\%-66,67\%=33,33\%\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}\%m_{CH_4}=\dfrac{0,1.16}{3}.100\%=53,33\%\\\%m_{C_2H_4}=100\%-53,33\%=46,67\%\end{matrix}\right.\)

b) \(m=m_{C_2H_4}=0,05.28=1,4\left(g\right)\)

\(\begin{array} {l} n_{Br_2}=\dfrac{41,6}{160}=0,26(mol)\\ \text{Đặt }n_{C_2H_4}=x(mol);n_{C_2H_2}=y(mol)\\ \to x+y=\dfrac{4,48}{22,4}=0,2(1)\\ C_2H_4+Br_2\to C_2H_4Br_2\\ C_2H_2+2Br_2\to C_2H_2Br_4\\ \text{Theo PT: }x+2y=n_{Br_2}=0,26(2)\\ (1)(2)\to\begin{cases} x=0,14\\ y=0,06 \end{cases} \\ \to \begin{cases} \%V_{C_2H_4}=\dfrac{0,14}{0,2}.100\%=70\%\\  \%V_{C_2H_2}=100-70=30\% \end{cases} \end{array}\)

\(\begin{array} {l} n_{Br_2}=\dfrac{41,6}{160}=0,26(mol)\\ \text{Đặt }n_{C_2H_4}=x(mol);n_{C_2H_2}=y(mol)\\ \to x+y=\dfrac{4,48}{22,4}=0,2(1)\\ C_2H_4+Br_2\to C_2H_4Br_2\\ C_2H_2+2Br_2\to C_2H_2Br_4\\ \text{Theo PT: }x+2y=n_{Br_2}=0,26(2)\\ (1)(2)\to\begin{cases} x=0,14\\ y=0,06 \end{cases} \\ \to \begin{cases} \%V_{C_2H_4}=\dfrac{0,14}{0,2}.100\%=70\%\\  \%V_{C_2H_2}=100-70=30\% \end{cases} \end{array}\)