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1. \(n_{O_2}=\frac{V}{22,4}=\frac{6,72}{22,4}=0,3\left(mol\right)\)
2.
\(n_{CO_2}=\frac{m}{M}=\frac{4,4}{44}=0,1\left(mol\right)\)
\(n_{O_2}=\frac{m}{M}=\frac{3,2}{32}=0,1\left(mol\right)\)
\(V_{HC}=n.22,4=\left(0,1+0,1\right).22,4=4,48\left(l\right)\)
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![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{O_2}=\dfrac{3,2}{32}=0,1\left(mol\right)\)
=> Vhh = (0,1+0,15).22,4 = 5,6 (l)
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\(n_{NH_3}=\dfrac{5,1}{17}=0,3\left(mol\right);n_{O_2}=\dfrac{3,2}{32}=0,1\left(mol\right)\)
\(\Rightarrow n_{hh}=0,3+0,1=0,4\left(mol\right)\)
\(\Rightarrow V_{hh}=0,4.22,4=8,96\left(l\right)\)
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1. Ta có: nSO2 = \(\frac{2,24}{22,4}=0,1\left(mol\right)\)
=> mSO2 = 0,1 x 64 = 6,4 (gam)
nO2 = \(\frac{3,36}{22,4}=0,15\left(mol\right)\)
=> mO2 = 0,15 x 32 = 4,8 (gam)
=> Khối lượng hỗn hợp:mhỗn hợp=mO2 + mSO2 = 6,4 + 4,8 = 11,2g
2. Ta có: nCO2 = \(\frac{4,4}{44}=0,1\left(mol\right)\)
nO2 = \(\frac{3,2}{32}=0,1\left(mol\right)\)
=> Vhỗn hợp(đktc) = ( 0,1 + 0,1 ) x 22,4 = 4,48 (l)
3. Số mol H2O: nH2O = \(\frac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)
Câu 3:
\(n_{H_2O}=\frac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a.
\(2Cu+O_2\rightarrow\left(t^o\right)2CuO\) \(4Al+3O_2\rightarrow\left(t^o\right)2Al_2O_3\)
x 1/2x x y 3/4y 1/2y ( mol )
Gọi \(\left\{{}\begin{matrix}n_{Cu}=x\\n_{Al}=y\end{matrix}\right.\)
Ta có:
\(\left\{{}\begin{matrix}64x+27y=26,3\\80x+\dfrac{1}{2}y.102=41,5\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}x=0,2\\y=0,5\end{matrix}\right.\)
\(V_{kk}=\left(\dfrac{1}{2}.0,2+\dfrac{3}{4}.0,5\right).22,4.5=0,475.112=53,2l\)