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a) PTHH: \(2CO+O_2\underrightarrow{t^o}2CO_2\) (1)
\(4H_2+O_2\underrightarrow{t^o}2H_2O\) (2)
b) Ta có: \(\left\{{}\begin{matrix}\Sigma n_{O_2}=\dfrac{9,6}{32}=0,3\left(mol\right)\\n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}n_{O_2\left(1\right)}=0,1mol\\n_{O_2\left(2\right)}=0,2mol\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}m_{CO}=0,1\cdot28=2,8\left(g\right)\\m_{H_2}=0,2\cdot2=0,4\left(g\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}\%m_{CO}=\dfrac{2,8}{2,8+0,4}\cdot100\%=87,5\%\\\%m_{H_2}=12,5\%\end{matrix}\right.\)
c) PTHH: \(2KMnO_4\underrightarrow{t^o}K_2MnO_4+MnO_2+O_2\uparrow\)
Theo PTHH: \(n_{KMnO_4}=2n_{O_2}=0,6mol\)
\(\Rightarrow m_{KMnO_4}=0,6\cdot158=94,8\left(g\right)\)
\(n_{O_2}=\dfrac{89.6}{22.4}=4\left(mol\right)\)
\(n_{H_2O}=3a\left(mol\right)\)
\(n_{CO_2}=a\left(mol\right)\)
\(2H_2+O_2\underrightarrow{^{^{t^0}}}2H_2O\)
\(2CO+O_2\underrightarrow{^{^{t^0}}}2CO_2\)
\(n_{O_2}=1.5a+0.5a=4\left(mol\right)\)
\(\Leftrightarrow a=2\)
\(n_{H_2}=3\left(mol\right),n_{CO}=1\left(mol\right)\)
\(\%V_{H_2}=\dfrac{3}{4}\cdot100\%=75\%\)
\(\%V_{CO}=25\%\)
\(\%m_{H_2}=\dfrac{3\cdot2}{3\cdot2+1\cdot28}\cdot100\%=17.64\%\)
\(\%m_{CO}=100-17.64=82.36\%\)
\(n_{CO_2}=\dfrac{8.8}{44}=0.2\left(mol\right)\)
\(n_{O_2}=\dfrac{9.6}{32}=0.3\left(mol\right)\)
\(2CO+O_2\underrightarrow{t^0}2CO_2\)
\(0.2.......0.1.......0.2\)
\(2H_2+O_2\underrightarrow{t^0}2H_2O\)
\(0.4......0.3-0.1\)
\(\%m_{CO}=\dfrac{0.2\cdot28}{0.2\cdot28+0.4\cdot2}\cdot100\%=87.5\%\)
\(\%m_{H_2}=100-87.5=12.5\%\)
a)
\(2CO + O_2 \xrightarrow{t^o} 2CO_2(1)\\ 2H_2 + O_2 \xrightarrow{t^o} 2H_2O(2) \)
b)
\(n_{CO_2} = \dfrac{8,8}{44} = 0,2(mol)\\ n_{O_2} = \dfrac{9,6}{32} = 0,3(mol)\)
Theo PTHH :
\(n_{CO} = n_{CO_2} = 0,2(mol)\\ n_{O_2(1)} = \dfrac{1}{2}n_{CO_2} = 0,1(mol)\\ n_{H_2} = 2n_{O_2(2)} = 2(0,3-0,1) = 0,4(mol)\)
Vậy :
\(\%m_{CO} = \dfrac{0,2.28}{0,2.28+0,4.2}.100\% = 87,5\%\\ \%m_{H_2} = 100\% - 87,5\% = 12,5\%\)
$n_{CO_2} = \dfrac{8,8}{44} = 0,2(mol)$
\(2CO+O_2\xrightarrow[]{t^o}2CO_2\)
0,2 0,1 0,2 (mol)
$n_{O_2} = \dfrac{9,6}{32} = 0,3(mol)$
\(2H_2+O_2\xrightarrow[]{t^o}2H_2O\)
0,4 0,2 0,2 (mol)
\(\%m_{CO}=\dfrac{0,2.44}{0,2.44+0,4.2}.100\%=91,67\%\\ \%m_{H_2}=100\%-91,67\%=8,33\%\)
\(\%n_{CO}=\dfrac{0,2}{0,2+0,4}.100\%=33,33\%\\ \%n_{H_2}=100\%-33,33\%=66,67\%\)
Đặt \(\left\{{}\begin{matrix}n_{CuO}=x\left(mol\right)\\n_{Fe_2O_3}=y\left(mol\right)\end{matrix}\right.\)
\(m_{CuO}+m_{Fe_2O_3}=40\\ \Rightarrow80x+160y=40\left(1\right)\)
\(PTHH:CuO+H_2\underrightarrow{t^o}Cu+H_2O\\ \left(mol\right)......x\rightarrow.x\\ PTHH:Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\\ \left(mol\right).....y\rightarrow....3y\\ V_{H_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\\ \Rightarrow x+3y=0,6\left(2\right)\)
\(\xrightarrow[\left(2\right)]{\left(1\right)}\left\{{}\begin{matrix}80x+160y=40\\x+3y=0,6\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}x=0,3\\y=0,1\end{matrix}\right.\)
a) \(\left\{{}\begin{matrix}m_{CuO}=80.0,3=24\left(g\right)\\m_{Fe_2O_3}=40-24=16\left(g\right)\end{matrix}\right.\)
b) \(\left\{{}\begin{matrix}\%m_{CuO}=\dfrac{24}{40}.100\%=60\%\\\%m_{Fe_2O_3}=100\%-60\%=40\%\end{matrix}\right.\)
PTHH: 2CO+O2to→2CO2 (1)
4H2+O2to→2H2O (2)
b) Ta có:
ΣnO2=\(\dfrac{9,6}{32}\)=0,3(mol)
nCO2=\(\dfrac{8,8}{44}\)=0,2(mol)
⇒{nO2(1)=0,1mol
nO2(2)=0,2mol
⇒{mCO=0,1⋅28=2,8(g)
mH2=0,2⋅2=0,4(g)
⇒%mCO=\(\dfrac{2,8}{2,8+0,4}\)⋅100%=87,5%
%mH2=12,5%
\(nO_2=\dfrac{9,6}{32}=0,3\left(mol\right)\)
\(nCO_2=\dfrac{8,8}{44}=0,2\left(mol\right)\)
\(2CO+O_2\underrightarrow{t^o}2CO_2\)
2 1 2 (mol)
0,2 0,1 0,2 (mol)
\(4H_2+O_2\underrightarrow{t^o}2H_2O\)
4 1 2 (mol)
0,8 0,2 0,4 (mol)
\(mCO=0,2.28=5,6\left(g\right)\)
\(mH_2=0,8.2=0,16\left(g\right)\)
\(\%mCO=\dfrac{5,6.100}{5,6+0,16}=97,22\%\)
\(\%mH_2=100-97,22=2,78\%\)
a)
\(n_{O_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
\(n_{H_2O}=\dfrac{1,8}{18}=0,1\left(mol\right)\)
PTHH: 2H2 + O2 --to--> 2H2O
0,1<-0,05<-------0,1
2CO + O2 --to--> 2CO2
0,2<--0,1-------->0,2
=> \(\left\{{}\begin{matrix}V_{H_2}=0,1.22,4=2,24\left(l\right)\\V_{CO}=0,2.22,4=4,48\left(l\right)\end{matrix}\right.\)
b) \(m_{CO_2}=0,2.44=8,8\left(g\right)\)
\(n_{O_2}=\dfrac{3,36}{22,4}=0,15mol\)
\(n_{H_2O}=\dfrac{1,8}{18}=0,1mol\)
\(2CO+O_2\rightarrow2CO_2\)
a 0,5a a
\(2H_2+O_2\rightarrow2H_2O\)
0,1 0,05 \(\leftarrow\) 0,1
\(\Sigma n_{O_2}=0,5a+0,05=0,15\)
\(\Rightarrow a=n_{O_2\left(CO\right)}=0,2mol\)
\(V_{CO}=2\cdot0,2\cdot22,4=8,96l\)
\(V_{H_2}=0,1\cdot22,4=2,24l\)
\(m_{CO_2}=0,2\cdot44=8,8g\)
nO2 = 9.6/32 = 0.3 (mol)
nCO2 = 8.8/44 = 0.2 (mol)
CO + 1/2O2 -to-> CO2
0.2_____0.1______0.2
H2 + 1/2O2 -to-> H2O
0.4__0.3-0.1
%CO = 0.2*28/(0.2*28 + 0.4*2) * 100% = 87.5%
Chúc bạn học tốt !!!
Mk củm chúc bn hc tốt , chậc bài nào bn cx giải giúp mìn hết lun á , khum bít ns j nên CỦM ƠN NHA ( Hc giỏi gơ á )
a, -Gọi số mol của CuO và Fe2O3 lần lượt là x, y ( mol )
PTKL : \(80x+160y=40\left(I\right)\)
\(CuO+H_2\rightarrow Cu+H_2O\)
..x.........x............
\(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)
...y............3y......
=> \(n_{H_2}=x+3y=\dfrac{V}{22,4}=0,6\left(mol\right)\left(II\right)\)
- Giair I và II ta được : x = 0,3 , y = 0,1 ( mol )
=> \(\left\{{}\begin{matrix}mCuO=n.M=24\left(g\right)\\mFe2O3=mhh-mCuO=16\left(g\right)\end{matrix}\right.\)
b, \(\%CuO=\dfrac{m}{mhh}.100\%=60\%\)
=> %Fe2O3 =100% - %CuO = 40% .
Vậy ...
a)
2H2 + O2 --to--> 2H2O
2CO + O2 --to--> 2CO2
b)
Gọi số mol H2, CO là a, b
=> 2a + 28b = 68
PTHH: 2H2 + O2 --to--> 2H2O
a--->0,5a
2CO + O2 --to--> 2CO2
b----->0,5b
=> 0,5a + 0,5b = \(\dfrac{89,6}{22,4}=4\)
=> a = 6(mol); b = 2(mol)
\(\left\{{}\begin{matrix}\%m_{H_2}=\dfrac{6.2}{68}.100\%=17,65\%\\\%m_{CO}=\dfrac{2.28}{68}.100\%=82,35\%\end{matrix}\right.\)