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![](https://rs.olm.vn/images/avt/0.png?1311)
nCH4 = 6.72: 22,4 = 0.3 (mol)
a)
PTHH CH4 + 2O2 → CO2 + 2H2O
1 2 1 2 (mol)
0,15 0,3 0,15 0,3
b)
VO2 = n.22,4 = 0,6 . 22,4 = 13.44 (l)
⇒V kk = V O2 . 5 = 13.44 . 5 = 67.2 (l)
PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
Ta có: \(n_{CH_4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
Theo PT: \(\left\{{}\begin{matrix}n_{CO_2}=n_{CH_4}=0,3\left(mol\right)\\n_{O_2}=n_{H_2O}=2n_{CH_4}=0,6\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow m_{CO_2}=0,3.44=13,2\left(g\right)\)
\(m_{H_2O}=0,6.18=10,8\left(g\right)\)
\(V_{O_2}=0,6.22,4=13,44\left(l\right)\Rightarrow V_{kk}=13,44.5=67,2\left(l\right)\)
Bạn tham khảo nhé!
![](https://rs.olm.vn/images/avt/0.png?1311)
nCH4 = 4,48/22,4 = 0,2 (mol)
PTHH: CH4 + 2O2 -> (t°) CO2 + 2H2O
Mol: 0,2 ---> 0,4 ---> 0,2 ---> 0,4
Vkk = 0,2 . 5 . 22,4 = 44,8 (l)
mCO2 = 0,2 . 44 = 8,8 (g)
mH2O = 0,4 . 18 = 7,2 (g)
PTHH: Ca(OH)2 + CO2 -> CaCO3 + H2O
Mol: 0,2 <--- 0,2 ---> 0,2
mCaCO3 = 0,2 . 100 = 20 (g)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{C_2H_4}=\dfrac{13,44}{22,4}=0,6mol\)
\(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
0,6 1,8 1,2 1,2
a)\(V_{O_2}=1,8\cdot22,4=40,32l\)
\(V_{kk}=5V_{O_2}=5\cdot40,32=201,6l\)
b)\(m_{CO_2}=1,2\cdot44=52,8g\)
\(m_{H_2O}=1,2\cdot18=21,6g\)
c)\(n_{NaOH}=0,3\cdot2=0,6mol\)
\(CO_2+2NaOH\rightarrow Na_2CO_3+H_2O\)
1,2 0,6 0 0
0,3 0,6 0,3 0,3
0,9 0 0,3 0,3
\(m_{muối}=0,3\cdot106=31,8g\)
\(m_{H_2O}=0,3\cdot18=5,4g\)
nC2H4 = 13,44/22,4 = 0,6 (mol)
PTHH: C2H4 + 3O2 -> (t°) 2CO2 + 2H2O
Mol: 0,6 ---> 1,8 ---> 1,2 ---> 1,2
VO2 = 1,8 . 22,4 = 40,32 (l)
Vkk = 40,32 . 5 = 201,6 (l)
mCO2 = 1,2 . 44 = 52,8 (g)
mH2O = 1,2 . 18 = 21,6 (g)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, \(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
Ta có: \(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
Theo PT: \(n_{O_2}=3n_{C_2H_4}=1,5\left(mol\right)\Rightarrow V_{O_2}=1,5.22,4=33,6\left(l\right)\)
b, \(V_{kk}=\dfrac{V_{O_2}}{20\%}=168\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
CH4+2O2-to>CO2+2H2O
0,2-----0,4------0,2
n CH4=0,2 mol
=>mCO2=0,2.44=8,8g
=>VO2=0,4.22,4=8,96l
=>Vkk=8,96.5=44,8l
nCH4 = 4,48:22,4 = 0,2 (mol)
pthh : CH4 + 2O2 -t-> CO2 + 2H2O
0,2 0,4 0,2
mCO2 = 0,2 . 44 = 8,8 (G)
VO2 = 0,4 . 22,4 = 8,96 (L)
=> Vkk = VO2 : 20% = 8,96 : 20% = 44,8 (L)
![](https://rs.olm.vn/images/avt/0.png?1311)
PTHH: \(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
\(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
Theo PTHH: \(n_{O_2}=3.n_{C_2H_4}=3.0,5=1,5\left(mol\right)\)
=> \(V_{O_2\left(đktc\right)}=1,5.22,4=33,6\left(l\right)\)
câu b oxi chiếm bao nhiêu của kk vậy bạn
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{C_2H_4}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)
C2H4 + 3O2 ----to---> 2CO2 + 2H2O
0,4 1,2 0,8
\(m_{H_2O}=0,8.18=14,4\left(g\right)\)
\(V_{kk}=5V_{O_2}=5.1,2.22,4=134,4\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{C_2H_2}=\dfrac{2,8}{22,4}=0,125\left(mol\right)\\ a,2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\\ b,n_{CO_2}=0,125.2=0,25\left(mol\right)\\ m_{CO_2}=0,25.44=11\left(g\right)\\ c,n_{O_2}=\dfrac{5}{2}.0,125=0,3125\left(mol\right)\\ V_{O_2\left(đktc\right)}=0,3125.22,4=7\left(l\right)\\ \Rightarrow V_{kk\left(đktc\right)}=\dfrac{100}{20}.7=35\left(l\right)\)
a) \(CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O\)
b)
\(n_{CH_4} = \dfrac{6,72}{22,4} = 0,3(mol)\\ n_{CO_2} = n_{CH_4} = 0,3(mol)\\ n_{H_2O} = 2n_{CH_4} = 0,6(mol)\\ \Rightarrow m_{sản\ phẩm} = 0,3.44 + 0,6.18 = 24(gam)\)
c)
\(n_{O_2} = 2n_{CH_4} = 0,3.2 = 0,6(mol)\\ \Rightarrow V_{O_2} = 0,6.22,4= 13,44(lít)\\ \Rightarrow V_{không\ khí} = 5V_{O_2} = 13.44.5 = 67,2(lít)\)