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CN
0
H
24 tháng 3 2021
Câu 2
\((1) MnO_2 + 4HCl \to MnCl_2 + Cl_2 + 2H_2O\\ (2) Cl_2 + H_2 \xrightarrow{as} 2HCl\\ (3) 3Cl_2 + 2Fe \xrightarrow{t^o} 2FeCl_3\\ (4) 2FeCl_3 + Fe \to 3FeCl_2\\ (5) 2NaOH + Cl_2 \to NaCl + NaClO + H_2O\)
H
24 tháng 3 2021
\((1) 4Al + 3O_2 \xrightarrow{t^o} 2Al_2O_3\\ (2) 2Fe + 3Cl_2 \xrightarrow{t^o} 2FeCl_3\\ (3) C + O_2 \xrightarrow{t^o} CO_2\\ (4) 2KMnO_4 \xrightarrow{t^o} K_2MnO_4 + MnO_2 + O_2\\ (5) 4P + 5O_2 \xrightarrow{t^o} 2P_2O_5\\ (6) 2KClO_3 \xrightarrow{t^o} 2KCl + 3O_2\\ (7) Fe + H_2SO_4 \to FeSO_4 + H_2\\ (8) Cu + 2H_2SO_4 \to CuSO_4 + SO_2 + 2H_2O\\ (9) 2Fe + 6H_2SO_4 \to Fe_2(SO_4)_3 + 3SO_2 + 6H_2O\\ (10) 2Al + 6H_2SO_4 \to Al_2(SO_4)_3 + 3SO_2 + 6H_2O\)
11 tháng 5 2021
k bt đó là thật k nx nhưng tạm tin nha nhưng bù lại văn mk chỉ đc 8 điểm thôi
KY
17 tháng 7 2021
1 )
1. She wishes her father (be) WERE here now to help her.
2. I wish you (not give) HADN'T GIVEN them my phone number yesterday.
3. I wish they ( visit) HAD VISITED us when they were in town.
4. I wish someone (give) WOULD GIVE me a job next month.
5. If only I (can take) COULD TAKE the trip to Hanoi with her next summer.
6. We wish we (understand) HAD UNDERSTOOD all the teacher's explanation yesterday.
7. He missed an exciting football match on TV last night. He wishes he (watch) HAD WATCHED it.
8. He only I (have) HAD more time to do this job.
9. I wish she (come) HAD COME to see me yesterday.
10. I wish that someday I (be) WOULD BE able to marry her.
2) 2 were rich
3 our football team would not lose the game
4 he had finished his homework last night
5 I could go hiking with them
6 I hadn't broken the vase
8 Tom had been interested in mathematics
9 I hadn't been absent from class yesterday
10 I hadn't missed an interesting ...
11 she kept silent in the hospital
12 I hadn't spoken to him...
13 she had more money
MN
1
3 tháng 2 2023
c: \(=3.7\cdot12+3.7\cdot70+3.7\cdot18\)
=3,7(12+70+18)
=3,7*100=370
d: \(=202,2\left(3+6+1\right)=202,2\cdot10=2022\)
e: \(=4,5\cdot15+4,5\cdot90+4,5\cdot25=4,5\left(15+90+25\right)=585\)
i: \(=3.18\cdot4+3.18\cdot75+3.1\cdot8+3.18\cdot13\)
\(=3,18\left(4+75+13\right)+24,8\)
\(=317.36\)
C
1
1V
1