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![](https://rs.olm.vn/images/avt/0.png?1311)
2:
a: \(V=0.2\cdot22.4=4.48\left(lít\right)\)
b: \(n_{N_3}=\dfrac{14}{42}=\dfrac{1}{3}\left(mol\right)\)
\(V=\dfrac{1}{3}\cdot22.4=\dfrac{224}{30}\left(lít\right)\)
3:
a: \(m_{CaCO_3}=0.5\cdot\left(40+12+16\cdot3\right)=50\left(g\right)\)
b: \(n_{SO_2}=\dfrac{5.6}{22.4}=0.25\left(mol\right)\)
\(m_{SO_2}=0.25\cdot\left(32+16\cdot2\right)=16\left(g\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
4.
a) \(V_{SO_2}=0.5\cdot22.4=11.2\left(l\right)\)
b) \(V_{CH_4}=\dfrac{3.2}{16}\cdot22.4=4.48\left(l\right)\)
c) \(V_{N_2}=\dfrac{0.9\cdot10^{23}}{6\cdot10^{23}}\cdot22.4=3.36\left(l\right)\)
5.
a) \(m_{Al}=0.1\cdot27=2.7\left(g\right)\)
b) \(m_{Cu\left(NO_3\right)_2}=0.3\cdot188=56.4\left(g\right)\)
c) \(m_{Na_2CO_3}=\dfrac{1.2\cdot10^{23}}{6\cdot10^{23}}\cdot106=21.2\left(g\right)\)
d) \(m_{CO_2}=\dfrac{8.96}{22.4}\cdot44=17.6\left(g\right)\)
e) \(m_K=0.5\cdot2\cdot39=39\left(g\right)\\ m_C=0.5\cdot12=6\left(g\right)\\ m_O=0.5\cdot3\cdot16=24\left(g\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, VO\(_2\) = 0,15 . 22,4 = 3,36 lít
b, V\(CO_2\) = \((\dfrac{48}{44}).22,4\approx24,43\) ( lít )
c, \(V_{SO_2}=\left(\dfrac{16}{64}\right).22,4=5,6\) ( lít )
\(V_{H_2}=\left(\dfrac{18.10^{23}}{6.10^{23}}\right).22,4=67,2\) ( lít )
=> \(V_{hh}=5,6+67,2=72,8\) ( lít )
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
\(n_{SO_2}=\dfrac{m}{M}=\dfrac{3,2}{64}=0,05\left(mol\right)\\ n_{CO_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
b)
\(n_{Cl_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{1,344}{22,4}=0,06\left(mol\right)\Rightarrow m_{Cl_2}=n.M=0,06.71=4,26\left(mol\right)\\ n_{Na_2CO_3}=n.M=0,5.106=53\left(g\right)\)
c)
\(V_{N_2\left(\text{đ}ktc\right)}=n.22,4=0,25.22,4=5,6\left(l\right)\\ n_{O_2}=\dfrac{m}{M}=\dfrac{4,8}{32}=0,15\left(mol\right)\Rightarrow V_{O_2\left(\text{đ}ktc\right)}=n.22,4=0,15.22,4=3,36\left(l\right)\)
bạn giải cho mình thêm dc ko ạ
Hãy tính thể tích không khí cần dùng để đốt cháy hoàn toàn 13,44 lit khí B. Biết rằng: - Khí Oxi chiếm 1/5 thể tích không khí. - Khí B có tỉ khối so với hidro bằng 8. Thành phần % theo khối lượng của khí B là 75%C và 25% H.
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1 :
a) \(2H_2 + O_2 \xrightarrow{t^o} 2H_2O\)
b)
\(n_{O_2} = \dfrac{1}{2}n_{H_2} = \dfrac{1}{2}. \dfrac{6,72}{22,4} = 0,15(mol)\\ \Rightarrow V_{O_2} = 0,15.22,4 = 3,36(lít)\\ \Rightarrow m_{O_2} = 0,15.32 = 4,8(gam)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left\{{}\begin{matrix}C_xH_y:a\left(mol\right)\\CO:b\left(mol\right)\end{matrix}\right.=>a+b=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
\(n_{CO_2}=\dfrac{22}{44}=0,5\left(mol\right)\)
\(n_{H_2O}=\dfrac{7,2}{18}=0,4\left(mol\right)\)
\(n_{O_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)
Bảo toàn C: ax + b = 0,5
Bảo toàn H: ay = 0,8
Bảo toàn O: b + 0,6.2 = 0,5.2 + 0,4
=> b = 0,2 (mol)
=> a = 0,1 (mol)
=> x = 3 ; y = 8 => CTPT: C3H8
\(\left\{{}\begin{matrix}\%V_{C_3H_8}=\dfrac{0,1}{0,3}.100\%=33,33\%\\\%V_{CO}=\dfrac{0,2}{0,3}.100\%=66,67\%\end{matrix}\right.\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) nNaOH=20/40=0,5(mol)
nN2=1,12/22,4=0,05(mol)
nNH3= (0,6.1023)/(6.1023)=0,1(mol)
b) mAl2O3= 102.0,15= 15,3(g)
mSO2= nSO2 . M(SO2)= V(CO2,đktc)/22,4 . 64= 6,72/22,4. 64= 0,3. 64= 19,2(g)
mH2S= nH2S. M(H2S)= (0,6.1023)/(6.1023) . 34=0,1. 34 = 3,4(g)
c) V(CO2,đktc)=0,2.22.4=4,48(l)
nSO2=16/64=0,25(mol) -> V(SO2,đktc)=0,25.22,4=5,6(l)
nCH4=(2,1.1023)/(6.1023)=0,35(mol) -> V(CH4,đktc)=0,35.22,4=7,84(l)
![](https://rs.olm.vn/images/avt/0.png?1311)
Gọi 2 hh trên lần lượt là A và B
\(M_A=\dfrac{\dfrac{8,96}{22,4}.71+\dfrac{5,6}{22,4}.32}{\dfrac{8,96}{22,4}+\dfrac{5,6}{22,4}}=56\left(\dfrac{g}{mol}\right)\)
\(M_B=\dfrac{0,2.64+0,4.44}{0,2+0,4}=51\left(\dfrac{g}{mol}\right)\)
=> dA/B = \(\dfrac{56}{51}=1,1\)
a)\(n_{Mg}=\dfrac{m_{Mg}}{M_{Mg}}=\dfrac{24}{24}=1\left(mol\right)\)
\(n_{Fe_2O_3}=\dfrac{m_{Fe_2O_3}}{M_{Fe_2O_3}}=\dfrac{16}{56.2+3.16}=\dfrac{16}{160}=0,1\left(mol\right)\)
\(n_{H_2SO_4}=\dfrac{m_{H_2SO_4}}{M_{H_2SO_4}}=\dfrac{16}{2.1+32+4.16}=\dfrac{9,8}{98}=0,1\left(mol\right)\)
b)\(n_{CO_2}=\dfrac{V_{CO_2}}{22,4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
\(n_{O_2}=\dfrac{V_{O_2}}{22,4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
\(n_{SO_2}=\dfrac{V_{SO_2}}{22,4}=\dfrac{8,96}{22,4}=0,6\left(mol\right)\)