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a)
\(n_{Br_2}=\dfrac{8}{160}=0,05\left(mol\right)\)
PTHH: C2H4 + Br2 --> C2H4Br2
0,05<--0,05
=> \(V_{C_2H_4}=0,05.22,4=1,12\left(l\right)\)
=> \(V_{CH_4}=4,48-1,12=3,36\left(l\right)\)
b) \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{1,12}{4,48}.100\%=25\%\\\%V_{CH_4}=\dfrac{3,36}{4,48}.100\%=75\%\end{matrix}\right.\)
\(n_{Br_2}=\dfrac{8}{160}=0.05\left(mol\right)\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
\(0.05......0.05\)
\(V_{C_2H_4}=0.05\cdot22.4=1.12\left(l\right)\)
\(V_{CH_4}=20-1.12=18.88\left(l\right)\left(mol\right)\)
\(\%V_{C_2H_4}=\dfrac{1.12}{20}\cdot100\%=5.6\%\)
\(\%V_{CH_4}=100-5.6=94.4\%\)
\(n_{hhk}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)
\(n_{C_2H_4Br_2}=\dfrac{47}{188}=0,25\left(mol\right)\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
0,25 0,25 0,25 ( mol )
\(\%V_{C_2H_4}=\dfrac{0,25}{0,4}.100=62,5\%\)
\(\%V_{CH_4}=100-62,5=37,5\%\)
\(V_{Br_2}=\dfrac{0,25}{1}=0,25\left(l\right)\)
PTHH: C2H4 + Br2 --> C2H4Br2
0,1<--0,1
=> \(\%V_{C_2H_4}=\dfrac{0,1.22,4}{22,4}=10\%\)
=> %VCH4 = 100% - 10% = 90%
\(a,n_{Br_2}=\dfrac{6,4}{160}=0,04\left(mol\right)\)
PTHH: C2H4 + Br2 ---> C2H4Br2
0,04<---0,04
\(\rightarrow\left\{{}\begin{matrix}V_{C_2H_4}=0,04.22,4=0,896\left(l\right)\\V_{CH_4}=2,24-0,896=1,344\left(l\right)\end{matrix}\right.\\ b,\rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,896}{2,24}.100\%=40\%\\\%V_{CH_4}=100\%-40\%=60\%\end{matrix}\right.\)
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
Bài 1:
\(n_{Br_2}=\dfrac{8}{160}=0,05\left(mol\right)\)
PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
Theo PT: \(n_{C_2H_4}=n_{Br_2}=0,05\left(mol\right)\)
\(\Rightarrow V_{C_2H_4}=0,05.22,4=1,12\left(l\right)\)
\(\Rightarrow V_{CH_4}=3,36-1,12=2,24\left(l\right)\)
Bài 2:
Ta có: \(n_{C_2H_2}+n_{C_2H_4}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\left(1\right)\)
m dd tăng = mC2H2 + mC2H4
\(\Rightarrow6,8=26n_{C_2H_2}+28n_{C_2H_4}\left(2\right)\)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{C_2H_2}=0,1\left(mol\right)\\n_{C_2H_4}=0,15\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}V_{C_2H_2}=0,1.22,4=2,24\left(l\right)\\V_{C_2H_4}=0,15.22,4=3,36\left(l\right)\end{matrix}\right.\)
\(PTHH:C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
\(n_{C_2H_4Br_2}=\frac{9,4}{188}=0,05\left(mol\right)\)
\(\Rightarrow n_{Br_2}=0,05\left(mol\right);n_{C_2H_4}=0,05\left(mol\right)\)
\(V_{Br_2}=0,05.22,4=1,12\left(l\right)\)
\(V_{C_2H_4}=0,05.22,4=1,12\left(l\right)\)
\(\%V_{C_2H_4}=\frac{1,12}{4,48}.100=25\%\)
\(\%V_{CH_4}=100\%-25\%=75\%\)
\(a,n_{C_2H_4Br_2}=\dfrac{9,4}{188}=0,05\left(mol\right)\\ PTHH:C_2H_4+Br_2\rightarrow C_2H_4Br_2\\ Mol:0,05\leftarrow0,05\leftarrow0,05\\ V_{Br_2}=\dfrac{0,05}{0,1}=0,5\left(l\right)=500\left(ml\right)\)
\(b,\%V_{C_2H_4}=\dfrac{0,05.22,4}{4,48}=25\%\\ \%V_{CH_4}=100\%-25\%=75\%\)