có ai biết giải k giải hộ mình với ( các bn giải chi tiết hộ mình nha )

bài 1: cho biết rằng 1,12 lit cacbon dioxit (đktc) td vừa đủ với 100ml dd NaOH tạo muối trung hòa 

a, viết PTHH

b,tính nồng độ mol của dd NaOH đã dùng 

bài 2: hãy chọn chất thích hợp để điền vào trong chỗ trống để hoàn thành pt sau:

a, ...... + H₂O→H₂SO₄

b, H₂O + ........→ H₂pO₄

c, ........ + Hcl→ cucl₂ + .........

d, ........ + H₂SO₄→ CuSO₄ + .........

e, CuO + ........ → Cu + H₂O

bài 3: cho 38,4g một oxit axit của phi kim x có hóa trị (IV) td vừa đủ với dd NaOH thu đc 400g dd muối , nồng độ 18,9 ‰↓  . xđ công thức oxit.

                                                       (dấu này ‰ là dấu phần trăm nha mn)

có ai biết giải bài giải bài này ko giúp mình với mình đang cần rất rất gấp mong các bạn giúp cho

Bài 1: cho các chất sau: CuO, Na₂SO_3, Al, Fe₂O₃,NO, Fe(OH)₃ . Hãy chon 1 trong các chất đã cho tác dụng với axit sunfuric loãng sinh ra:

a, khí nặng hơn không khí và gây nên hiện tượng mưa axit

b, dd có màu xanh lam

c, dd có màu vàng nâu

d, dd ko có màu

viết PTHH xảy ra

Bài 2: cho các axit sau: FeO, SO₂, CO, MgO, CO₂.

a, oxit nào tác dụng được với dd axit clohidric

b, oxit nào t/d đc với dd kali hiđrôxit

c, oxit nào t/d vs nước 

Viết PTHH

Bài 3: cho V lit khí sunfuro (ĐKTC) t/d vừa đủ với 200ml Ca(OH)₂ nồng độ  0,5M tạo muối trung hòa.

a, Viết PTHH

b, Tính giá trị của V

c, tính khối lượng muối tạo thành.

có ai biết làm bài này k giúp mình với mình đang cần rất rất gấp mong các bạn giúp cho.

I/ Change the following sentences from active into passive form.

1. Somebody has taken my briefcase.=>……………………………………………………………

2. The teacher returned our written work to us.=>………………………………………………….

3. She had finished her report by soon.=>…………………………………………………………….

4. The police have arrested five suspects.=>………………………………………………………….

5. The doctor ordered him to take a long rest.=>…………………………………………………………

6. A group of students have met their friends at the rail way station.

=>……………………………………………………………………..

7. They didn’t allow Tom to take these books home.

=>……………………………………………………………..

8. The teacher won’t correct exercises tomorrow.

=>……………………………………………………………….

9. Marry has operated Tom since 10 o’clock.

=>……………………………………………………………….

10. They didn’t look after the children properly.

=>……………………………………………………………..

11. Nobody swept this street last week.=>…………………………………………………

12. People speak English all over the world.

=>……………………………………………………………

13. Tom was writing two poems.=>…………………………………………………

14. She often takes her dog for a walk.=>…………………………………………………

15. They can’t make tea with cold water.=>…………………………………………………

16. The chief engineer was instructing all the workers of the plan.

=>…………………………………………………………………….

17. Somebody has taken some of my book away.

=>……………………………………………………….

18.. They will hold the meeting before the May Day.

=>………………………………………………………………

19. The boys broke the window and took away some pictures.

=>…………………………………………………………………….

20. People spend a lot of money on advertising everyday.

->……………………………………………………………………..

II. Choose the best answer

1.I come from Canada. Where .................you..................from?

a. do.............come         b. did ...... come     c. are ..........coming        d, have .....come

2. The telephones…………..by Alexander Graham Bell

A. is invented                 B. is inventing                C. Invented           D. was invented

3. The swimming pool .............. at 9 o’clock and ............ at 18.30 everyday.

a. opens............. closes   b. opens ...... closed      c. opened...... closed    d. opened......... closes

4. Three swimmers, Paul, Ed, and Jim, ................ now in competition  for medals.

a. is                       b. has been                      c. had been            d. are

5. Listen ! I .............. somebody knocking at the front door. 

a. am hearing         b. heard                          c. have heard         d. hear

6.. ………………………………………..yet?

A. Have the letters been typed            B. Have been the letters typed

C. Have the letters typed                    D. Had the letters typed

7. At 5 o’clock yesterday evening, I ……………my clothes.

a. am ironing         b. have ironed       c. ironed               d. was ironing.

8. I ………………..along the street when I suddenly heard footsteps behind me.

a. was walking      b. am walking        c. walk                            d. walked.

9. She ………….German for two years.

a. has learnt           b. is learning         c. learn        d. learns.

10. When  I last………..Jane, she ………..to find a job.

a. see/was trying    b. saw/was trying c. have seen/tried            d. saw/tried.

12. French is a…………language to learn than English is.

        A. difficult      B. more difficult       C. most difficult        D. more and more difficult

13. The more polluted air we breathe,…….we get.

          A. the more weaker                  B. the more weak

          C. the weaker                           D. weaker more

14. The more we study, the……we are.

          A. more good                 B. better               C. better than        D. good

15. The more I tried my best to help her, ……….she became.

          A. less lazy                     B. the lazier           C. the more lazy    D. lazier

16. The weather becomes………………

          A. colder with colder                                   B. colder and colder

          C. colder and more colder                            D. more and more cold

17. The more he slept,…………….irritable he became.

          A. the most                     B. the vey more     C. much more       D. the more

18. ………..he worked, the more he earned.

          A. The more hard           B. The hard           C. The harder        D. The hardest

19. ………I get to know Jim, the more I like him.

          A. For more                    B. More                C. The more D. The most

20. The competition makes the price of goods……….

          A. most cheap and cheap                    B. cheaper and cheaper

          C. more cheap and more cheap           D. cheaper and more cheaper

có ai biết làm bài này k giúp mình với mình đang cần rất rất mong các bạn giúp cho.

.

V. Sử dụng thì hiện tại đơn hoặc thì hiện tại tiếp diễn trong những câu sau

1.  She ........................................ (play) tennis every Sundays.

2. The students (not, be).........................in class at present.

3. The children (play)........................... in the park at the moment.

4.  He ........................................ (buy) a cup of coffee every morning.

5.  Julie ........................................ (come) from Russia .

6. Jack and Peter  (work) ________ late today.

7.  Luke ........................................ (usually /study) hard to be polite.

8.  She ........................................ (enjoy) going swimming twice a week.

9. The weather (get) ________ cold this season.

10. My children (be)_____ upstairs now. They (play)______ games.

 11.  Lucy ........................................ (wash) her hair every day

12.  John never ........................................ (cry).

13.  My mother always ........................................ (say) that love is more important than money.

14.  Julie ........................................ (pass) the exam once a year.

15. The sun ........................................ (rise) in the East.

..................................................