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\(a) C_2H_4 + Br_2 \to C_2H_4Br_2\\ n_{C_2H_4} = n_{Br_2} = \dfrac{48}{160} = 0,3(mol)\\ \%V_{C_2H_4} = \dfrac{0,3.22,4}{8,96}.100\% = 75\%\\ \%V_{CH_4} = 100\% -75\% = 25\%\\ b)\)
Khí còn lại : CH4
\(CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + H_2O\\ n_{CO_2} = n_{CH_4} = \dfrac{8,96.25\%}{22,4} = 0,1(mol)\\ m_{CO_2} = 0,1.44 = 4,4(gam)\)
\(n_{Br_2}=\dfrac{m_{Br_2}}{M_{Br_2}}=\dfrac{16}{160}=0,1mol\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
0,1 0,1 ( mol )
\(\%V_{C_2H_4}=\dfrac{0,1.22,4}{16,8}.100=13,33\%\)
\(\%V_{CH_4}=100\%-13,33\%=86,67\%\)
a, PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
Khí thoát ra khỏi bình là CH4 (metan).
b, Ta có: \(\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{1,12}{5,6}.100\%=20\%\\\%V_{C_2H_4}=100-20=80\%\end{matrix}\right.\)
c, Ta có: \(V_{C_2H_4}=5,6.80\%=4,48\left(l\right)\)
\(\Rightarrow n_{C_2H_4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Theo PT: \(n_{Br_2}=n_{C_2H_4}=0,2\left(mol\right)\)
\(\Rightarrow m_{Br_2}=0,2.160=32\left(g\right)\)
Bạn tham khảo nhé!
Gọi số mol C2H4, C2H2 là a, b (mol)
=> a + b = \(\dfrac{0,672}{22,4}=0,03\left(mol\right)\) (1)
PTHH: C2H4 + Br2 --> C2H4Br2
a-------------->a
C2H2 + 2Br2 --> C2H2Br4
b----------------->b
=> 188a + 346b = 8,8 (2)
(1)(2) => a = 0,01 (mol); b = 0,02 (mol)
=> \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,01}{0,03}.100\%=33,33\%\\\%V_{C_2H_2}=\dfrac{0,02}{0,03}.100\%=66,67\%\end{matrix}\right.\)
a, PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
b, - Khí thoát ra là CH4.
⇒ VCH4 = 4,48 (l)
\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{4,48}{11,2}.100\%=40\%\\\%V_{C_2H_4}=100-40=60\%\end{matrix}\right.\)
C3H6O: \(CH_3-CH_2-CHO\)
C3H8: \(CH_3-CH_2-CH_3\)
C3H4: \(CH\equiv C-CH_3\)
C2H6O: \(CH_3-CH_2-OH\)
C4H9Cl: \(CH_3-CH_2-CH_2-CH_2Cl\)
C2H4O2: \(CH_3-C\left(OH\right)=O\)
\(C_6H_6:\)
C2H7N: \(CH_3-CH_2-NH_2\)