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nBr2 = 32/160 = 0,2 (mol)
PTHH: C2H4 + Br2 -> C2H4Br2
Mol: 0,2 <--- 0,2
VC2H4 = 0,2 . 22,4 = 4,48 (l)
%VC2H4 = 4,48/6,2 = 72,25%
%VCH4 = 100% - 72,25% = 27,75%
a, PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
b, - Khí thoát ra là CH4.
⇒ VCH4 = 4,48 (l)
\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{4,48}{11,2}.100\%=40\%\\\%V_{C_2H_4}=100-40=60\%\end{matrix}\right.\)
\(n_{C_2H_4Br_2}=\dfrac{9,4}{188}=0,05mol\)
\(n_{hh}=\dfrac{5,6}{22,4}=0,25mol\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
0,05 0,05 0,05 ( mol )
\(m_{Br_2}=0,05.160=8g\)
\(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,05}{0,25}.100=20\%\\\%V_{CH_4}=100\%-20\%=80\%\end{matrix}\right.\)
\(a,n_{Br_2}=\dfrac{6,4}{160}=0,04\left(mol\right)\)
PTHH: C2H4 + Br2 ---> C2H4Br2
0,04<---0,04
\(\rightarrow\left\{{}\begin{matrix}V_{C_2H_4}=0,04.22,4=0,896\left(l\right)\\V_{CH_4}=2,24-0,896=1,344\left(l\right)\end{matrix}\right.\\ b,\rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,896}{2,24}.100\%=40\%\\\%V_{CH_4}=100\%-40\%=60\%\end{matrix}\right.\)
nBr2 = 32/160 = 0,2 (mol)
PTHH: C2H4 + Br2 -> C2H4Br2
Mol: 0,2 <--- 0,2
nhh khí = 44,8/22,4 = 2 (mol)
%VC2H4 = 0,2/2 = 10%
%VCH4 = 100% - 10% = 90%
\(C_2H_2+2Br_2->C_2H_2Br_4\\ n_{hh}=\dfrac{3,36}{22,4}=0,15mol\\ n_{CH_4}=\dfrac{2,24}{22,4}=0,1mol\\ n_{C_2H_2}=0,05mol\\ n_{Br_2}=2.0,05=0,1mol\\ m_{Br_2}=0,1.160=16g\\ \%V_{CH_4}=\dfrac{0,1}{0,15}.100\%=66,67\%\\ \%V_{C_2H_2}=33,33\%\)
a) Khí thoát ra là CH4
\(n_{CH_4}=\dfrac{3,7185}{24,79}=0,15\left(mol\right)\)
\(\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{3,7185}{14,874}.100\%=25\%\\\%V_{C_2H_4}=100\%-25\%=75\%\end{matrix}\right.\)
b)
\(n_{C_2H_4}=\dfrac{14,874.75\%}{24,79}=0,45\left(mol\right)\)
PTHH: C2H4 + Br2 --> C2H4Br2
0,45-->0,45
=> \(C_{M\left(dd.Br_2\right)}=\dfrac{0,45}{0,15}=3M\)
c)
PTHH: CH4 + 2O2 --to--> CO2 + 2H2O
0,15---------------------->0,3
C2H4 + 3O2 --to--> 2CO2 + 2H2O
0,45------------------------->0,9
=> mH2O = (0,3 + 0,9).18 = 21,6 (g)
\(n_{Br_2}=\dfrac{20}{160}=0,125\left(mol\right)\)
PTHH: C2H4 + Br2 ---> C2H4Br2
0,125 0,125
\(\%V_{C_2H_4}=\dfrac{0,125.22,4}{5,6}=50\%\\ \%V_{CH_4}=100\%-50\%=50\%\)
a, nBr2 = 8/160 = 0,05 (mol)
PTHH: C2H4 + Br2 -> C2H4Br2
Mol: 0,05 <--- 0,05 <--- 0,05
Vhh khí = 2,8/22,4 = 0,125 (mol)
%VC2H4 = 0,05/0,125 = 40%
%CH4 = 100% - 40% = 60%
b, nCH4 = 0,125 - 0,05 = 0,075 (mol)
PTHH: C2H4 + 3O2 -> (t°) 2CO2 + 2H2O
Mol: 0,05 ---> 0,15
CH4 + 2O2 -> (t°) CO2 + 2H2O
Mol: 0,075 ---> 0,15
Vkk = (0,15 + 0,15) . 5 . 22,4 = 33,6 (l)
a, PTHH: C2H4 + Br2 -> C2H4Br2
b, Khí thoát ra là CH4
%VCH4 = 6,72/10,08 = 66,66%
%VC2H4 = 100% - 66,66% = 33,34%
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