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Làm ơn giúp mình với, mình cảm ơn
\(1.Ca+2HCl->CaCl2+H2\)
\(2.H2+Cl2->2HCl\)
\(3.2Mg+O2->2MgO\)
\(4.FeO+C0->Fe+CO2\)
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Các bạn chú ý điều kiện nhiệt độ là một phần vô cùng quan trọng trong một phản ứng hóa học, nếu không có thì để ngàn năm phản ứng cũng không xảy ra, không viết điều kiện được thì nên chú thích. Thứ hai các chỉ số, và chất phải đúng thứ tự trên dưới, viết cùng một dòng là sai bản chất hoàn toàn. Các bạn tập trung hơn vào câu trả lời nhé !
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\(Ca+2HCl\rightarrow CaCl_2+H_2\)
\(4Na+O_2\underrightarrow{^{^{t^0}}}2Na_2O\)
\(H_2+Cl_2\underrightarrow{^{^{t^0}}}2HCl\)
\(2Mg+O_2\underrightarrow{^{^{t^0}}}2MgO\)
\(FeO+CO\underrightarrow{^{^{t^0}}}Fe+CO_2\)
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Giúp mình với tối mình phải nộp rồi giúp mình với mình cảm ơn nhiều lắm 
a. Chu vi là \(\left(12+5\right).2=34\left(m\right)\)
Diện tích là \(12.5=60\left(m^2\right)=600000\left(cm^2\right)\)
b. Cần lát \(600000:\left(40.40\right)=375\) viên gạch
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a) Chu vi lối đi là :
( 12 + 2 ) x 2 = 28 ( m )
Diện tích lối đi là :
12 x 2 = 24 ( m2 )
b) Diện tích 1 viên gạch là :
40 x 40 = 1600 ( cm2 ) = 0,16 m2
Cần số viên gạch là :
24 : 0,16 = 150 ( viên )
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Làm ơn giúp mình với, mình cảm ơn🙏🏻
Giúp mình với
Ai giúp mình thì cho mình cảm ơn
Mn giúp mình với ạ!Mình cảm ơn!!!
Bài 1:Chứng minh rằng B = 2 + 22 + 23 + 24 + ........ + 299 + 2100 chia hết cho 31.
Mình cảm ơn mn ạ!Giúp mình với tối nay 20:00 mình phải nộp bài rồi!!!
\(B=2+2^2+2^3+2^4+...+2^{99}+2^{100}=2\left(1+2^2+2^3+2^4\right)+...+2^{96}\left(1+2^2+2^3+2^4\right)=2.31+2^6.31+...+2^{96}.31=31\left(2+2^6+...+2^{96}\right)⋮31\)
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B=2+22+23+24+...+299+2100=2(1+22+23+24)+...+296(1+22+23+24)=2.31+26.31+...+296.31=31(2+26+...+296)⋮31
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Giúp mình với mình sắp phải nộp rồi help me giúp mình với .Mình cảm ơn nhiều lắm 
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Các bạn làm ơn giúp mình với. Mình cảm ơn ạ!
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Các bạn làm ơn giúp mình với. Mình cảm ơn ạ!
Các bạn làm ơn giúp mình với. Mình cảm ơn ạ!
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Các bạn làm ơn giúp mình với. Mình cảm ơn ạ!
AI CHỈ MÌNH VỚI MÌNH CẢM ƠN AI GIÚP MÌNH VỚI MÌNH CẢM ƠN NHIỀU21. Hoa looks red. She was outdoors yesterday. Perhaps she has _______ A. flu B. sunburn C. spots D. stomachache22. My family has decided to use _________ electricity by using more solar energy instead. A. more B. less C. much D. fewe...
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AI CHỈ MÌNH VỚI MÌNH CẢM ƠN
AI GIÚP MÌNH VỚI MÌNH CẢM ƠN NHIỀU
21. Hoa looks red. She was outdoors yesterday. Perhaps she has _______
A. flu B. sunburn C. spots D. stomachache
22. My family has decided to use _________ electricity by using more solar energy instead.
A. more B. less C. much D. fewer
23. I ............... playing board games interesting because I can play them with my friends.
A. find B. think C. say D. tell
24. Circle the word that has the underlined part pronounced differently from the others.
A. curl B. keen C. city D. cook
25. I …………….. Nha Trang when I was a child.
A. visit B. visited C. will visit D. have visited
26. He …………… to the USA so far.
A. is B. was C. will be D. has been
27. Americans eat a lot of junk food, ………….junk food causes obesity.
A. but B. and C. so D. because
28. Tim: I feel itchy and my nose is running. Doctor: ………………………..
A. Wash your hair more. B. I think you have the flu.
C. Drink more water. Eat less meat D. I think you have a stomachache.
29. Pick out the word whose main stress is placed differently from the others.
A. allergy B. headache C. temperature D. obesity
30. Choose the word that has the underlined part pronounced differently from the others.
A. cold B. curly C. ocean D. clothes
31. -“What would you like to drink now?” - “_______________.”
A. No, thanks B. Yes, please C. I like to do nothing D. Orange juice, please
32. All of us enjoy _______ to classical music.
A. listen B. listens C. listening D. listened
33. She worked very hard, _______she passed all her exams.
A. because B. and C. so D. but
35. -“ Would you like me to turn off your computer?
- “ ______________. I’ll do it myself”
A. No, thanks B. Yes, please C. Don’t do it D. Of course
PART B. WRITING
I. Put the verbs in the correct form.
1. I enjoy (fish) .................................................. because it (be) ……………….… relaxing.
2. Jane will play chess after she (finish) …………………………. school.
3. What …………………… your mother often (do) ………………………at weekends?
4. I think, in the future people (not play) ………………………………… individual games.
5. We find (arrange) ……………………… flowers interesting because it (help) ……………… us relax.
6. I (not collect) ………….……………………… dolls when I grow up.
7. She often (go) ......................... to the market with her mother every weekend.
8. We (visit) ...................... Hue next month.
9. My younger sister (collect) ................. dolls two years ago.
10. .................. you ever (do) ................. volunteer work ?
II. Arrange these words/ phrases into the meaning sentences
1. sunburn / yesterday / was / because / outside / has / Alice / she / all / day .
……………………………………………………………………………………………..
2. and / difficult / boring / that / eggshells / people / carving / Some / say / is
..…………………………………………………………………………………………..
3. girl / have / is / the / kind-hearted / She / most / ever / I /met
……………………………………………………………………………………………..
4. organization / the / to / encouraged / people / Big Heart / has / protect / environment.
……………………………………………………………………………………………..
III. Write full sentences using the suggested words and phrases given.
1.Tuan / find / play / table tennis / interesting / because / he / can / play / best friends.
…………………………………………………………………………………………
2.They / visited / Ho Chi Minh City / so far.
…………………………………………………………………………………………
3.Lan / like / talk / to / her friends / her free time.
…………………………………………………………………………………………
4. We/ not eat/ out/ since/ mom’s birthday.
…………………………………………..
5. How/ long/ you/ live/ here?
…………………………………………..
6. You/ ever/ been/ Russia?
…………………………………………..
7. She/ not/ meet/ kids/ since Christmas.
…………………………………………..
8. They/ repair/ lamps/ yet?
…………………………………………..
IV. Complete each sentence so it means the same as the sentence above.
1. I didn’t go to school because I was sick.
à I was sick, so …………………………………………………………………
2.It will be good if you eat less meat and more vegetables.
à You should ………………………………………………………………………
3. He likes playing computer games in his free time.
à His hobby is ……………………………………………………………………..
4. I am interested in watching TV in the evening.
à I enjoy ………………………………………………………………………
5.I think that learning English is important.
à I find ……………………………………………………………………………..
6. He started working as a bank clerk 3 months ago.
=> He has.................................................................................................................
7. I last had my hair cut in November.
=> I haven't................................................................................................................
8. The last time we called each other was 5 months ago.
=> We haven't.............................................................................................................
21. Hoa looks red. She was outdoors yesterday. Perhaps she has _______
A. flu B. sunburn C. spots D. stomachache
22. My family has decided to use _________ electricity by using more solar energy instead.
A. more B. less C. much D. fewer
23. I ............... playing board games interesting because I can play them with my friends.
A. find B. think C. say D. tell
24. Circle the word that has the underlined part pronounced differently from the others.
A. curl B. keen C. city D. cook
25. I …………….. Nha Trang when I was a child.
A. visit B. visited C. will visit D. have visited
26. He …………… to the USA so far.
A. is B. was C. will be D. has been
27. Americans eat a lot of junk food, ………….junk food causes obesity.
A. but B. and C. so D. because
28. Tim: I feel itchy and my nose is running. Doctor: ………………………..
A. Wash your hair more. B. I think you have the flu.
C. Drink more water. Eat less meat D. I think you have a stomachache.
29. Pick out the word whose main stress is placed differently from the others.
A. allergy B. headache C. temperature D. obesity
30. Choose the word that has the underlined part pronounced differently from the others.
A. cold B. curly C. ocean D. clothes
31. -“What would you like to drink now?” - “_______________.”
A. No, thanks B. Yes, please C. I like to do nothing D. Orange juice, please
32. All of us enjoy _______ to classical music.
A. listen B. listens C. listening D. listened
33. She worked very hard, _______she passed all her exams.
A. because B. and C. so D. but
35. -“ Would you like me to turn off your computer?
- “ ______________. I’ll do it myself”
A. No, thanks B. Yes, please C. Don’t do it D. Of course
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I. Put the verbs in the correct form.
1. I enjoy (fish) ........................fishing.......................... because it (be) ……is………….… relaxing.
2. Jane will play chess after she (finish) …………finishes………………. school.
3. What ……………does……… your mother often (do) ………do………………at weekends?
4. I think, in the future people (not play) ……………won't play…………………… individual games.
5. We find (arrange) ………arranging……………… flowers interesting because it (help) ………helps……… us relax.
6. I (not collect) ………….won't collect……………………… dolls when I grow up.
7. She often (go) ..........goes............... to the market with her mother every weekend.
8. We (visit) ...........will visit.......... Hue next month.
9. My younger sister (collect) ........collected......... dolls two years ago.
10. ..........Do........ you ever (do) ........do......... volunteer work ?
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Các giúp mình với mình cảm ơn các bạn giúp mình nhưng mình cần gấp rút lắm luôn mong các bạn giúp mình với
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