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![](https://rs.olm.vn/images/avt/0.png?1311)
a) mO2= nO2. M(O2)=0,45. 32=14,4(g)
b) mBaCO3=nBaCO3.M(BaCO3)=0,6.197=118,2(g)
c) mAl2(SO4)3=nAl2(SO4)3.M(Al2(SO4)3)=1,5.342=513(g)
d) nSO2=V(SO2,đktc)/22,4=16,8/22,4=0,7(mol)
=> mSO2=nSO2.M(SO2)=0,7.64=44,8(g)
e) nH2O=(3.1023):(6.1023)=0,5(mol)
=>mH2O=nH2O.M(H2O)=0,5.18=9(g)
f) nCO2=V(CO2,đktc)/22,4=8,96/22,4=0,4(mol)
=>mCO2=nCO2.M(CO2)=0,4.44=17,6(g)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,m_{NaOH}=0,25.40=10(g)\\ b,n_{CO_2}=\dfrac{2,24}{22,4}=0,1(mol)\\ m_{CO_2}=0,1.44=4,4(g)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a.
\(m_{Al}=0.5\cdot27=13.5\left(g\right)\)
\(m_{CO_2}=\dfrac{6.72}{22.4}\cdot44=13.2\left(g\right)\)
\(m_{N_2}=\dfrac{5.6}{22.4}\cdot28=7\left(g\right)\)
\(m_{CaCO_3}=0.25\cdot100=25\left(g\right)\)
b.
\(m_{hh}=\dfrac{3.36}{22.4}\cdot2+\dfrac{5.6}{22.4}\cdot28+0.2\cdot44=16.1\left(g\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(n_{Fe}=\dfrac{14}{56}=0,25\left(mol\right)\)
\(n_{CaCO_3}=\dfrac{25}{100}=0,25\left(mol\right)\)
\(n_{NaOH}=\dfrac{4}{40}=0,1\left(mol\right)\)
\(n_{...}=\dfrac{1,5.10^{23}}{6.10^{23}}=0,25\left(mol\right)\)
b)
\(m_{ZnSO_4}=0,25.161=40,25\left(g\right)\)
\(m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)
\(m_{Cu}=0,3.64=19,2\left(g\right)\)
\(m_{Fe_2\left(SO_4\right)_3}=0,35.400=140\left(g\right)\)
d) \(V_{CO_2}=0,2.22,4=4,48\left(l\right)\)
\(V_{Cl_2}=0,15.22,4=3,36\left(l\right)\)
\(V_{SO_2}=0,3.22,4=6,72\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1 :
Số mol , khối lượng , số phân tử của các chất lần lượt là :
\(a.\)\(\)
\(n_{O_2}=\dfrac{1.12}{22.4}=0.05\left(mol\right)\)
\(m_{O_2}=0.05\cdot32=1.6\left(g\right)\)
\(0.05\cdot6\cdot10^{23}=0.3\cdot10^{23}\left(pt\right)\)
\(b.\)
\(n_{SO_3}=\dfrac{2.24}{22.4}=0.1\left(mol\right)\)
\(m_{SO_3}=0.1\cdot80=8\left(g\right)\)
\(0.1\cdot6\cdot10^{23}=0.6\cdot10^{23}\left(pt\right)\)
\(c.\)
\(n_{H_2S}=\dfrac{36}{22.4}=\dfrac{45}{28}\left(mol\right)\)
\(m_{H_2S}=\dfrac{45}{28}\cdot34=\dfrac{765}{14}\left(g\right)\)
\(\dfrac{45}{28}\cdot6\cdot10^{23}=\dfrac{135}{14}\cdot10^{23}\left(pt\right)\)
\(d.\)
\(n_{C_4H_{10}}=\dfrac{4.48}{22.4}=0.2\left(mol\right)\)
\(m_{C_4H_{10}}=0.2\cdot58=11.6\left(g\right)\)
\(0.2\cdot6\cdot10^{23}=1.2\cdot10^{23}\left(pt\right)\)
Bài 2 :
\(a.\)
\(n_{SO_3}=\dfrac{16}{80}=0.2\left(mol\right)\)
Số phân tử SO3 : \(0.2\cdot6\cdot10^{23}=1.2\cdot10^{23}\left(pt\right)\)
\(b.\)
\(n_{NaOH}=\dfrac{8}{40}=0.2\left(mol\right)\)
Số phân tử NaOH : \(0.2\cdot6\cdot10^{23}=1.2\cdot10^{23}\left(pt\right)\)
\(c.\)
\(n_{Fe_2\left(SO_4\right)_3}=\dfrac{16}{400}=0.04\left(mol\right)\)
Số phân tử Fe2(SO4)3 : \(0.04\cdot6\cdot10^{23}=0.24\cdot10^{23}\left(pt\right)\)
\(d.\)
\(n_{Al_2\left(SO_4\right)_3}=\dfrac{34.2}{342}=0.1\left(mol\right)\)
Số phân tử Al2(SO4)3 : \(0.1\cdot6\cdot10^{23}=0.6\cdot10^{23}\left(pt\right)\)
a. \(m_{CO_2}=\dfrac{8,96}{22,4}.44=17,6\left(g\right)\)
b. \(m_{Fe}=\dfrac{1,8.10^{22}}{6.10^{23}}.56=1,68\left(g\right)\)
c. \(m_{Fe_2\left(SO_4\right)_3}=0,25.400=100\left(g\right)\)
Cảm ơn bạn nha