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![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: \(n_{C_4H_{10}}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
PT: \(2C_4H_{10}+13O_2\underrightarrow{t^o}8CO_2+10H_2O\)
a, Theo PT: \(n_{O_2}=\dfrac{13}{2}n_{C_4H_{10}}=1,3\left(mol\right)\)
\(\Rightarrow V_{O_2}=1,3.22,4=29,12\left(l\right)\)
b, Theo PT: \(n_{CO_2}=4n_{C_4H_{10}}=0,8\left(mol\right)\)
\(\Rightarrow m_{CO_2}=0,8.44=35,2\left(g\right)\)
c, PT: \(CO_2+2KOH\rightarrow K_2CO_3+H_2O\)
Theo PT: \(n_{K_2CO_3}=n_{CO_2}=0,8\left(mol\right)\)
\(\Rightarrow m_{K_2CO_3}=0,8.138=110,4\left(g\right)\)
2C4H10 + 13O2 = nhiệt độ => 8CO2 + 10H2O
nC4H10= \(\dfrac{4,48}{22,4}\)= 0,2 (mol)
=> nCO2= 5.nC4H10= 5.0,2 = 1 (mol)
=> mCO2= 1.44=44 (g)
nO2=\(\dfrac{13}{2.n_{C4H10}}\)= \(\dfrac{13}{2}\).0,2= 1,3 (mol)
=> VO2= 1,3 . 22,4= 29,12 (l)
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu 1:
\(m_{hh}=6+2,2=8,2g\)
\(n_{H_2}=\dfrac{6}{2}=3mol\)
\(n_{CO_2}=\dfrac{2,2}{44}=0,05mol\)
\(\Rightarrow V_{hh}=3.22,4+0,05.22,4=68,32l\)
Câu 2:
BTKL: \(m_A+m_{O_2}=m_{CO_2}+m_{H_2O}\)
\(\Rightarrow m_{H_2O}+m_{CO_2}=80g\)
Ta có: \(m_{CO_2}:m_{H_2O}=11:9\)
\(\Rightarrow m_{CO_2}=\dfrac{80}{11+9}.11=44g\)
\(\Rightarrow m_{H_2O}=36g\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a.MgCO_3-t^{^0}->MgO+CO_2\\ CaCO_3-t^{^0}->CaO+CO_2\\ b.n_{MgCO_3}=a,n_{CaCO_3}=b\\ 84a+100b=26,8\\ 40a+56b=13,6\\ a=0,2;b=0,1\\ \%m_{MgCO_3}=\dfrac{84a}{26,8}.100\%=62,69\%\\ \%m_{CaCO_3}=37,31\%\\ c.V_{CO_2}=22,4\left(a+b\right)=6,72L\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(n_{CO_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
PTHH: \(CH_4+2O_2\xrightarrow[]{t^o}CO_2+2H_2O\)
0,15<---0,3<----0,15
b) `m_{O_2} = 0,3.32 = 9,6 (g)`
c) `V_{CH_4} = 0,15.22,4 = 3,36 (l)`
![](https://rs.olm.vn/images/avt/0.png?1311)
a, \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
b, \(n_{CH_4}=\dfrac{28}{22,4}=1,25\left(mol\right)\)
\(n_{CO_2}=n_{CH_4}=1,25\left(mol\right)\Rightarrow m_{CO_2}=1,25.44=55\left(g\right)\)
c, \(n_{O_2}=2n_{CH_4}=2,5\left(mol\right)\Rightarrow V_{O_2}=2,5.22,4=56\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, PT: \(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
b, \(n_{H_2}=\dfrac{2,479}{24,79}=0,1\left(mol\right)\)
\(n_{CuO}=\dfrac{12}{80}=0,15\left(mol\right)\)
Xét tỉ lệ: \(\dfrac{0,15}{1}>\dfrac{0,1}{1}\), ta được CuO dư.
Theo PT: \(n_{H_2O}=n_{H_2}=0,1\left(mol\right)\Rightarrow m_{H_2O}=0,1.18=1,8\left(g\right)\)
c, BTKL, có: mH2 + mCuO = m chất rắn + mH2O
⇒ a = 0,1.2 + 12 - 1,8 = 10,4 (g)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{CO_2}=\dfrac{4.4}{44}=0.1\left(mol\right)\)
\(CH_4+2O_2\underrightarrow{^{^{t^0}}}CO_2+2H_2O\)
\(0.1.......0.2........0.1..........0.2\)
\(m_{CH_4}=0.1\cdot16=1.6\left(g\right)\)
\(V_{H_2O}=0.2\cdot22.4=4.48\left(l\right)\)
\(V_{kk}=5V_{O_2}=5\cdot0.2\cdot22.4=22.4\left(l\right)\)
\(a,2KHCO_3\rightarrow\left(t^o\right)K_2CO_3+CO_2+H_2O\\ b.n_{K_2CO_3}=\dfrac{27,6}{138}=0,2\left(mol\right)\\ n_{KHCO_3}=2.0,2=0,4\left(mol\right)\\ m_{KHCO_3}=100.0,4=40\left(g\right)\\ c,n_{CO_2}=n_{H_2O}=n_{K_2CO_3}=0,2\left(mol\right)\\ V_{hh\left(CO_2,H_2O\right)}=\left(0,2+0,2\right).22,4=8,96\left(l\right)\)
a, PTHH: 2KHCO3 -to-> K2CO3 + H2O + CO2
b, nK2CO3 = m/M = 27,6/138 = 0,2 (mol)
Theo PTHH: nKHCO3 = 2.nK2CO3 = 2 . 0,2 = 0,4 (mol)
=> mKHCO3 = n.M = 0,4 . 100 = 40 (g)
c, Theo PTHH: nCO2 = nH2O = nK2CO3 = 0,2 (mol)
=> nhh = nCO2 + nH2O = 0,2 + 0,2 = 0,4 (mol)
Ta có: Thể tích khí ở 20oC và 1 atm là đkt
=> Vhh(đkt) = n.24 = 0,4 . 24 = 9,6 (l)