Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2Fe_2S+8SO_2\rightarrow8SO_3+8H_2SO_4\)
Theo tỉ lệ khối lượng: 240 tấn FeS2 tạo 784 tấn H2SO4
=> 12 tấn FeS2 tạo \(\frac{12.784}{240}=39,2\) tấn H2SO4
Thực tế tạo ra 30.49%= 14,7 tấn H2SO4
\(\Rightarrow H=\frac{14,7.100}{39,2}=37,5\%\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{FeS_2}=\frac{12000000}{120}=100000\left(mol\right)\)
\(sdpu:FeS_2\rightarrow SO_2\rightarrow SO_3\rightarrow H_2SO_4\)
(mol)______ \(1\rightarrow2\rightarrow2\rightarrow2\)______
Ta thấy: 1 mol FeS2 sinh ra 2 mol H2SO4
Do đó: 100000 mol FeS2 sẽ sinh ra 200000 mol H2SO4
\(\Rightarrow m_{H_2SO_4}=200000.98=19600000\left(g\right)=19,6\left(tan\right)\)
\(H=\frac{30.49\%}{19,6}.100\%=75\left(\%\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1) Fe + H2SO4 --> FeSO4 + H2
2) Zn + 2HCl --> ZnCl2 + H2
3) 2Al + 3H2SO4 --> Al2(SO4)3 + 3H2
4) Zn + H2SO4 --> ZnSO4 + H2
5) Mg + 2HCl --> MgCl2 + H2
6) H2 + CuO --to--> Cu + H2O
7) 2H2 + O2 --to--> 2H2O
`->` Đáp án + Giải thích:
1) Fe + H2SO4 --> FeSO4 + H2
2) Zn + 2HCl --> ZnCl2 + H2
3) 2Al + 3H2SO4 --> Al2(SO4)3 + 3H2
4) Zn + H2SO4 --> ZnSO4 + H2
5) Mg + 2HCl --> MgCl2 + H2
6) H2 + CuO --to--> Cu + H2O
7) 2H2 + O2 --to--> 2H2O
![](https://rs.olm.vn/images/avt/0.png?1311)
\(1)\\ a) 4Na + O_2 \xrightarrow{t^o} 2Na_2O\\ b) Zn + 2HCl \to ZnCl_2 + H_2\\ c) CaO + H_2O \to Ca(OH)_2\\ d) SO_3 + H_2O \to H_2SO_4\\ 2)\\ a) 2Ba + O_2 \xrightarrow{t^o} 2BaO\\ b) CuO + H_2 \xrightarrow{t^o} Cu + H_2O\\ c) K + H_2O \to KOH + \dfrac{1}{2}H_2\\ d) CO_2 + H_2O \to H_2CO_3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
2O2+3Fe-to>Fe3O4
Fe3O4+4H2-to>3Fe+4H2O
2Fe+3Cl2-to>2Fecl3
Fe+2HCl->Fecl2+H2
\(3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\)
\(Fe_3O_4+4H_2\rightarrow\left(t^o\right)3Fe+4H_2O\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1.6KOH + Al2(SO4)3 → 3K2SO4 + 2Al(OH)3
2.2KMnO4 →K2MnO4 + MnO2 + O2
3.Fe3O4 + 4CO → 3Fe + 4CO2
4. 2KClO3→ 2KCl + 3O2
5. 2Al(OH)3 + 3H2SO4→ Al2(SO4)3 + 3H2O
![](https://rs.olm.vn/images/avt/0.png?1311)
4Al+3O2--->2Al2O3
2Al+6HCl--->2AlCl3+3H2
2Al+3H2SO4---->Al2(SO4)3+3H2
\(\text{4Al+3O 2 → 2Al 2 O 3}\)
\(2Al+\text{6 HCl → 2AlCl 2 + 3H 2}\)