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\(a.n_{CO_2}=\dfrac{4,4}{44}=0,1\left(mol\right);n_{O_2}=\dfrac{0,6.10^{23}}{6.10^{23}}=0,1\left(mol\right)\\ V_{hh}=\left(0,5+1,5+0,1+0,1\right).22,4=49,28\left(l\right)\\ b.m_{hh}=0,5.28+1,5.2+4,4+0,1.32=24,6\left(g\right)\)
a, VN\(_2\) ( đktc ) = 0,5 . 22,4 = 11,2 lít
VH\(_2\) = 1,5 . 22,4 = 33,6 lít
\(n_{CO_2}=\dfrac{4,4}{44}=0,1\) ( mol )
=> \(V_{CO_2}=0,1.22,4=2,24\) ( lít )
\(n_{O_2}=\dfrac{0,6.10^{23}}{6.10^{23}}=0,1\) ( mol )
=> V\(O_2\) = 0,1 .22,4 = 2,24 lít
=> Vhh = 11,2 + 33,6 + 2,24 + 2,24 = 49,28 lít
b, \(m_{N_2}=0,5.28=14\) ( g )
\(m_{H_2}=1,5.2=3\) ( g )
\(m_{CO_2}=0,1.44=4,4\) ( g )
\(m_{O_2}=0,1.32=3,2\) (g)
\(m_{hh}=14+3+4,4+3,2=24,6\) ( g )
Ta có :
\(n_{O_2} = \dfrac{3,2}{32} = 0,1(mol)\\ n_{CO_2} = \dfrac{4,4}{44} = 0,1(mol\\\)
Suy ra :
\(n_{hỗn\ hợp\ khí} = 0,1 + 0,1 = 0,2(mol)\\ \Rightarrow V_{hh\ khí} = 0,2.22,4 = 4,48(lít)\)
Ta có: nCO2=\(\dfrac{4,4}{44}\)=0,1 mol
nO2=\(\dfrac{3,2}{32}\)=0,1 mol
Vậy: Vhỗn hợp=24x(0,1+0,1)=4,8 l
Bài 1:
a) \(V_{khí}=\left(0,2+0,5+0,35\right)\cdot22,4=23,52\left(l\right)\)
b) \(m_{khí}=0,2\cdot64+0,5\cdot28+0,35\cdot28=36,6\left(g\right)\)
a, PT: \(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)
Ta có: \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
Theo PT: \(n_{O_2}=\dfrac{3}{4}n_{Al}=0,15\left(mol\right)\Rightarrow V_{O_2}=0,15.22,4=3,36\left(l\right)\)
b, PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
Ta có: \(n_{CH_4}=\dfrac{6.10^{22}}{6.10^{23}}=0,1\left(mol\right)\)
Theo PT: \(n_{O_2}=2n_{CH_4}=0,2\left(mol\right)\)
\(\Rightarrow V_{O_2}=0,2.22,4=4,48\left(l\right)\)
c, Ta có: \(n_S=\dfrac{3,2}{32}=0,1\left(mol\right)\)
\(n_P=\dfrac{6,2}{31}=0,2\left(mol\right)\)
PT: \(S+O_2\underrightarrow{t^o}SO_2\)
\(4P+5O_2\underrightarrow{t^o}2P_2O_5\)
Theo PT: \(n_{O_2}=n_S+\dfrac{5}{4}n_P=0,35\left(mol\right)\)
\(\Rightarrow V_{O_2}=0,35.22,4=7,84\left(l\right)\)
\(n_{O_2}=2a\left(mol\right),n_{N_2}=3a\left(mol\right),n_{SO_2}=4a\left(mol\right)\)
\(n_{hh}=2a+3a+4a=9a\left(mol\right)\)
\(\Rightarrow9a=\dfrac{5.4\cdot10^{23}}{6\cdot10^{23}}=0.9\)
\(\Rightarrow a=9\)
\(V_{hh}=0.9\cdot22.4=20.16\left(l\right)\)
\(m_{hh}=0.2\cdot32+0.3\cdot28+0.4\cdot64=40.4\left(g\right)\)
nCO2 = 4,4 / 44 = 0,1 (mol)
nN2 = 14,2 / 28 = 0,51 (mol)
=> Vhỗn hợp(đktc) = ( 0,1 + 0,51 ) x 22,4 = 13,664 lít
nCO2=4,4:44=0,1mol =>VCO2=0,1 x 22,4=2,24 lit
nN2=14,2:14x2=0,5 mol =>VCO2=0,5x22,4=11,2 lit
1)
Coi \(n_X = 1(mol)\)
Gọi : \(n_{CO_2} = a(mol) ; n_{N_2} = b(mol)\)
Ta có :
\(n_X = a + b = 1(mol)\\ m_X = 44a + 28b = 1.1,225.32(gam)\\ \Rightarrow a = 0,7 ; b = 0,3\)
Vậy :
\(\%V_{CO_2} = \dfrac{0,7}{1}.100\% = 70\%\\ \%V_{N_2} = 100\% - 70\% = 30\%\)
2)
\(n_X = \dfrac{1}{22,4}(mol)\\ \Rightarrow m_X = n.M = \dfrac{1}{22,4}.1,225.32 = 1,75(gam)\)
nX = 0,672/22,4 = 0,03 (mol)
Gọi nN2 = a (mol); nO2 = b (mol)
a + b = 0,03
28a + 32b = 0,88
=> a = 0,02 (mol); b = 0,01 (mol)
%VN2 = 0,02/0,03 = 66,66%
%VO2 = 100% - 66,66% = 33,34%
M(X) = 0,88/0,03 = 88/3 (g/mol)
nX = 2,2 : 88/3 = 0,075 (mol)
VH2 = VX = 0,075 . 22,4 = 1,68 (l)