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![](https://rs.olm.vn/images/avt/0.png?1311)
Đổi 1kg = 1000g
Do trong than có 5% tạp chất không cháy
=> có 95% là than nguyên chất
=>\(m_C=1000.95\%=950\left(g\right)\)
\(C+O2-->CO2\)
Ta có: Cứ 12g C điều chế được44g CO2
Vậy 950g C điều chế được \(\frac{950.44}{12}=3483,33\left(g\right)=3,4833\left(kg\right)\)
b) Cứ 12 g C cần dùng 32g oxi
Vậy \(950g\) C cần \(\frac{950.32}{12}=2522,33\left(g\right)\) oxi
\(\Rightarrow n_{O2}=\frac{2522,33}{32}\approx78,8\left(mol\right)\)
\(V_{O2}=78,8.22,4=1765,12\left(l\right)\)
\(V_{kk}=5V_{O2}=1765,12.5=8825,6\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1.a) n O2=\(\frac{4,5.10^{23}}{6.10^{23}}\)=0,75 (mol)
---> V O2 =0,75 . 22,4=16,8(l)
b)m O2= 0,75 . 32=24(g)
2.
m C= 1. 96%=0,96(g) --->n C=\(\frac{0,96}{12}\)=0,08(mol)
m S= 1 . 4%=0,04(g) ---> n S=\(\frac{0,04}{32}\)=0,00125(mol)
PTHH
C + O2 --t*--> CO2
0,08---> 0,08 ---->0,08 (mol)
S + O2 ---t*---> SO2
0,00125 --------> 0,00125
Tổng n O2= 0,08 + 0,00125= 0,08125 (mol)
V O2= 0,08125 . 22,4=1,82 (l)
m CO2= 0,08 . 44=3,52(g)
3) m C= 0,5 . 90%= 0,45 (g) ==> n C =\(\frac{0,45}{12}\)=0,0375(mol)
C + O2 ----> CO2
0,0375 ----> 0,0375 (mol)
V O2 = 0,0375 . 22,4=0,84 (l)
==>V kk= 5 . 0,84=4,2 (l)
![](https://rs.olm.vn/images/avt/0.png?1311)
2Zn+O2-to>2ZnO
0,1---0,05----0,1
n Zn=0,1 mol
nO2=0,025 mol
=>VO2=0,05.22,4=1,12l
=>mZnO=0,1.81=8,1g
c)Zn dư
=>m ZnO=0,05.81=4,05g
2Zn+O2-to>2ZnO
0,1---0,05----0,1
n Zn=6,5/65=0,1 mol
n O2=0,8/32=0,025 mol
=>VO2=0,05.22,4=1,12l
=>mZnO=0,1.81=8,1g
c)Zn dư
=>m ZnO=0,05.81=4,05g
![](https://rs.olm.vn/images/avt/0.png?1311)
a/ Ta có: \(n_{Mg}=\dfrac{4.8}{24}=0.2\left(mol\right)\)
PTHH:
\(2Mg+O_2\underrightarrow{t^o}2MgO\)
2 1
0.2 x
\(=>x=\dfrac{0.2\cdot1}{2}=0.1=n_{O_2}\)
\(=>V_{O_2\left(đktc\right)}=0.1\cdot22.4=2.24\left(l\right)\)
b/ \(2Mg+O_2\underrightarrow{t^o}2MgO\)
2 2
0.2 y
\(=>y=\left(0.2\cdot2\right):2=0.2=n_{MgO}\)
\(=>m_{MgO}=0.2\cdot\left(24+16\right)=8\left(g\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
nP2O5= 28,4/ 142=0,2(mol)
PTHH: 4P + 5 O2 -to-> 2 P2O5
a) nP=4/2 . nP2O5= 2. 0,2=0,4(mol)
=>mP=31.0,4=12,4(g)
b) nO2=5/2. 0,2=0,5(mol)
=>V(O2,đktc)=0,5.22,4=11,2(l)
Vì: Vkk=5.V(O2)
=>Vkk=5.11,2=56(l)
\(4P+5O_2\buildrel{{t^o}}\over\longrightarrow 2P_2O_5\\ n_{P_2O_5}=\frac{28,4}{142}=0,2(mol)\\ n_P=2n_{P_2O_5}=0,2.2=0,4(mol)\\ a/ m_P=0,4.31=12,4(g)\\ b/\\ n_{O_2}=2,5.n_{P_2O_5}=2,5.0,2=0,5(mol)\\ V_{O_2}=0,5.22,4=11,2(l)\\ V_{kk}=5.V_{O_2}=11,2.5=56(l) \)
![](https://rs.olm.vn/images/avt/0.png?1311)
SDPU: CH4 + O2--> CO2 + H2O
PTHH: CH4 + 2O2--> CO2 + 2H2O
1 2 1 2
0,05 0,1 0,05 0,1
nCH4=V/22,4= 1,12/22,4=0,05mol
VO2=n.22,4=0,1.22,4= 2,24 lít
VCO2=n.22,4=0,05.22,4=1,12 lít
![](https://rs.olm.vn/images/avt/0.png?1311)
\(1.m_{CaCO_3}=400.85\%=340\left(g\right)\\ \rightarrow n_{CaCO_3}=\frac{340}{100}=3,4\left(mol\right)\\ PTHH:CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2\uparrow\\ V_{CO_2}=3,4.22,4=76,16\left(l\right)\\ m_{HCl}=3,4.2.36,5=248,2\left(g\right)\\ m_{CaCl_2}=3,4.111=377,4\left(g\right)\)
\(2.\\ PTHH:C+O_2\underrightarrow{t^o}CO_2\\ PTHH:S+O_2\underrightarrow{t^o}SO_2\\ n_{SO_2}=\frac{4,48}{22,4}=0,2\left(mol\right)\\ \rightarrow m_S=0,2.32=6,4\left(g\right)\\ m_C=\sum_m-m_S=10-6,4=3,6\left(g\right)\\ \%_C=\frac{3,6}{10}.100=36\left(\%\right)\\ n_C=\frac{3,6}{12}=0,3\left(mol\right)\\ \sum n_{O_2}=0,3+0,2=0,5\left(mol\right)\\ \rightarrow V_{O_2}=0,5.22,4=11,2\left(l\right)\\ \rightarrow V_{KK}=5.11,2=56\left(l\right)\\ V_{CO_2}=0,3.22,4=6,72\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{Zn}=\dfrac{m_{Zn}}{M_{Zn}}=\dfrac{19,5}{65}=0,3mol\)
\(Zn+\dfrac{1}{2}O_2\rightarrow\left(t^o\right)ZnO\)
1 1/2 1 (mol)
0,3 0,15 0,3 ( mol )
PƯ trên thuộc loại phản ứng hóa hợp
\(m_{ZnO}=n_{ZnO}.M_{ZnO}=0,3.81=24,3g\)
\(V_{O_2}=n_{O_2}.22,4=0,15.22,4=3,36l\)
Ta có PT: C + O2 ➝ CO2
mC =1000- (1000 . 5%) = 950 (g)
nC = 950/12=79,166(mol)
theo PT ta có : nO2 = n C = 79,166(mol)
VO2=79,166.22,4=1773,3184(l)
=>Vkk=1773,3184.5=8866,592 l
=>VCO2=79,166.22,4=1773,3184 l
cảm ơn bạn