Bài toán: Biết C = 12; H = 1; O = 16, Br = 80, O = 16, Ca = 40 , Ba = 137
Bài 1: Cho 6,72 lít hỗn hợp khí gồm khí CH4 và C2H4 dẫn qua 100 ml dung dịch brom 2M, thì thấy có khí
thoát ra. Biết các chất khí đều được đo ở đktc
a) Viết phương trình hóa học xảy ra.
b) Tính thể tích khí thoát ra và thành phần % thể tích các chất khí có trong hỗn hợp khí.
c) Tính khối lượng sản phẩm thu được sau phản ứng

Bài 2: Cho 13,44 lít hỗn hợp khí gồm khí CH4 và C2H2 đi qua 200 ml dung dịch brom 2M thì thấy phản
ứng xảy ra hoàn toàn. Biết các chất khí đều được đo ở đktc
a) Viết phương trình hóa học xảy ra.
b) Tính thành phần % thể tích các chất khí có trong hỗn hợp khí.
c) Tính khối lượng sản phẩm thu được sau phản ứng .

Bài 3: Dẫn từ từ 11,2 lít hỗn hợp khí CH4 và C2H2 tác dụng với 200 ml dung dịch Brom thì thu được
69,2 gam sản phẩm và một lượng khí thoát ra. Biết các chất khí đều được đo ở đktc
a) Viết phương trình hóa học xảy ra.
b) Tính thể tích khí thoát ra và thành phần % thể tích các chất khí có trong hỗn hợp khí.
c) Xác định nồng độ mol của dung dịch Brom phản ứng.

giải giúp em vs em cần gấp ạ

word form

1/ They followed the instructions........(religious)

2/ Both of them like this car because it is........(economy)

3/ Each of my friends has a..........character.(differ)

4/ English is the.....language in Singapore.(office)

5/ He always wears a.........shirt.(stripe)

6/ Vietnamese people are very.........and hospitable.(friend)

7/ I have been............invited to the wedding.(official)

8/ The.....of this company is very necessary nowadays.(modern)

9/ They have know each other for 10 years.Their....is good.(correspond)

10/ In.........to Buddhism,there are other religions in my country.(add)

11/ There is an.......match between Vietnam and Lebanon on VTV3.(nation)

word form

1/I find it................to talk to Tom's grandfather.(interest)

2/It's difficult for me to make a.........in this situation.(decide)

3/Trung Trac and TRung Nhi were our great...........(hero)

4/There are a lot...........at tourist attractions in HCM city.(sightsee)

5/Most of the...........have lived here all their life.(village)

6/The room has been full of laughter since her............(arrive)

7/I find this piece of music very.............(rest)

8/People........forget things taht might be embarrassing to them.(convenient)

9/She swam and sunbathed,went.........and relaxed.(sightsee)

10/The hotel is modern and..............furnished.(comfort)

11/He is studying in the USA as an........student.(change)

12/We apologise for the error and any.........caused.(convenient)

13/Our.....are friendly to visitors.(village)

14/I chose it because the time and place were..........(convenience)

15/The legend of John Henry is based on a real..........figure.(history)

16/At that time,ice cream couldn't be.................bought in a store.(convent)

17/I felt more...........about my career than I used to.(relax)

18/We felt....and hungry after a long walk.(tire)

19/He lost the game because of his...........(care)

20/Smoking is not..........here.(allow)

21/Our friends are very interested in visiting some.............resorts(mountain)

22/Is there any.......in his mail? (interest)

23/His job no longer brings as much.........as it used to.(enjoy)

24/HE is one of the............regions of Viet Nam.(heroic)

25/They are going to.....the room with more pictures.(beauty)

26/He needed to............after the exertions of a budy day at work.(relaxing)

27/The nation's.........of coal decreased continously last year.(cosume)

28/.........will soon be paying higher air fares.(consume)

29/I'm going to spend the weekend just............(relxation)

30/He needs more time off duty for..........and rest.(relax)

31/You will be greeted..........in our party.(warm)

32/If your are having........connecting a network,click Advanced.(difficulty)

WORD FORM

1.Judie has a very beautiful seashell........(collect)

2.Keenny dances very .......(beutifil)

3.We were very.....wtith the weather on vacation.(lucky)

4.She should.....after a hard-working day.(relaxation)

5.Stella has collected coins for 10 years.She's really an exoerienced coin.......(collect)

6.I have great............for her as a writer.(admire)

7.Kerry's office is......20 miles north of Oxford city.(locate)

8.My friends and i love to go.......in the mountains every summer.(hike)

9.She often.......on their decision.(comment)

10.It's always.............to hear other people's of view.(interest)

11.Sapa is a......resort.(mountain)

12.Liz had an.........trip to her home village.(interest)

13.Men and women should.......equal rights.(enjoyment)

14.The evening passed.............(enjoy)

15.He lives only for....(enjoy)

16.He spoiled my.....by teling me the end of the film.(enjoy)

17.You should......for an hour.(relaxation)

18.He is........in playing soccer(interest)

19The accident happens because of driving.....(care)

20.You must be....when you open the door.(care)

21.He cycled....and had an accident.(care)

22.It's some of the most.......film I've ever seen.(enjoy)

23.Playing the piano is one of his favorite......(relax)

24.It was such an...holiday.(enjoy)

25.His sister will have an.........with her principal tomorrow.(appoint)

26.She spends the morning doing some.......(sightseer)

27.Thanks for your invitation to the party........ ,I can't come.(fortune)

28.Would you like to go......with us? (picnic)

29.We will wait you at the......to the supermarket.(enter)

30.His...to retire surprised all of the workes.(decide)

31.The play they performed was extremely.........(enjoy)

Word form

1.We....meet for a drink after work.(occassion)

2.He may be a very talented....,but as a manager he's a dead loss.(design)

3.S mini is an....car to run.(economy)

4.Don't you believe in.....between men and wommen? (Equal)

5.The story is written in richly....language.(poetry)

6.He gave an.....reading of his own poems.(inspire)

7.Her preference is for comfortable rather than.....clothes.(style)

8.He gave an.....reading of his own poems.(inspire)

9.The ao dai is the.....dress of Vietnam wommen.(tradition)

10.Traveling by subway is fast,.....and cheap.(convenience)

11.The program examine the role of women in.....society.(modernize)

12.Dreams are a rich source of.....for some writers.(Inspire)

13.I need you there to offer words of......(encourage)

14.She offered him an.....handkerchief.(embroider)

15.It's......to wear T-shirt and faded jeans.(fashino)

16.I wear my school uniform with.....(proud)

17.The worldwide......situation is getting worse and worse.(economy)

18.There clothes are attrative but entirely....(practise)

19.Many people enjoy the pleasures and.....of living downtown.(convenient)

20.Trinh Cong Son is one of the most well-known......in Viet Nam.(music)

21.I like wearing loose.....clothes.(comfort)

22.He was....dressed in jeans and a T-shirt.(casual)

23.Don't put too much....in what the newspapers say.(confident)

24. ............of the new car will start next year.(produce)

24.To Huu is a famous...his......are interesting.(poetry)

25.The designer has taken...from tree leaves.(inspire)

26.All the rooms were....furnished.(comfortable)

27.The symptoms can be....,unpleasant and serious.(comfort)

28.It's an interesting idea but there are many......difficulties.(practice)

29.The machine's unique.....prevents it from overheating.(designer)

30.Dreans can be a rich source of.....for an artist.(inspire)

31.It is u sually...to buy washing powder in large quantities.(economy)

33.We did the printing as......as we could possibly make it.(economy)

34.He has translated the English....into Vietnam.(poet)

Word form

1.Anna always enjoys talking to other people. She's very.........(friendliness)

2.They are really impressed by the..........of local people.(hospitable)

3.My Australian friends want to visit some......places in my hometown.(fame)

4.He said "Good morning in a most.....way(friend)

5.Maryam enjoyed the.....atmosphere of Ha Noi.(peace)

6.Jimmy is very young,so he has to.....on his parents.(dependence)

7.It seems very...for me to have a trip abroad.(difficulty)

8.He makes a good...on your parents.(impress)

9.Everyone likes Bao because he is very......(friend)

10.Is christams a.....holiday?(nation)

11.Read the....carefully before you take the medicine.(instruct)

12.Lam Truong is a good singer.He sings.....(beauty)

13.The tourists were really...by the beauty of the city.(impression)

14.In Malaysia.....is free and compulsory for children between the ages of 6 & 16.(educate)

15.I would recommend that you should read.....books and magazines.(education)

16.Coffe is one of the most.....agricultural products exported from Vietnam.(Importance)

17.She failed the driving test because she didn't follow the guidance the driving.....(instruct)

18.A lot of....come to Van Mieu every day.(visit)

19.I find it...to talk to Tom's grandfather.(interest)

20.Ha Noi is not.....from kuala Lumpur.(difference)

21.There are some very....building in the town.(impress)

22.Thank you for a most....evening.(enjoy)

23.Drug....led to her early death.(depend)

24.She has some very.....things to say on the subject.(interest)

25.Her....with Jim lasted many years.(correspond)

26.I value her....above anything else.(friend)

27.The country has more than ten.....newspapers.(nation).

Quá khứ & hiện tại hoàn thành

1.When did you start learning English?

-->How long_________

2.How long is it since you began to play for manchester team?

-->When_________

3.When did mary go shopping with my aunt?

-->How long is it______

4.How long have you worked for ABC bank?

-->How long ago______

5.When did you begin to play for the school soccer team?

-->How long______

6.How long have they worked this kind of job?

-->When______

7.How long ago did you last see peter?

-->How long is it____

8.When did he begin to teach English at this school?

-->How long____

9.How long have they got engaged?

-->When_____

10.When did your family start to live in the city?

-->How long_______

11.We haven't eaten this kind of food before.

--> This is the first time.....

12.this is the firs time i have gone to Vung Tau.

-->I have never.....

13.This is his firs travel to HCM city.

-->This is the first time....

14.This is the firs time we have tasted such delicious food.

-->We have never....

15.I have never written a letter to a foreigner before.

-->It is the first time...

16.This is the firs time she has attended the club.

-->She has never....

17.My sister has not come to Peter's house before.

-->This is the first time...

18.I have never seen a dirtier-looking dog before.

-->This is the first...

19.This is the first time we haven't tasted such delicious food befire.

-->We haven't...

20.This is the first time I have written such a long letter.

-->I have never.....

Quá khứ & hiện tại joanf thành

1.Mary has learned English for six year.

-->It is...

2.The last time we watched TV was two hours ago.

-->It has been

3.They have taught Geography at this school for a long time.

-->It is...

4.I stopped writing to my old friemd four weeks ago.

-->It is...

5.we last went to the beach ten years ago.

-->It has been....

6.I haven't taken any pho tograph for two years.

-->It is....

7.He has been unemployed for three days.

-->It's.....

8.John has not had his hair cut for over six months.

-->It has been....

9.She started working here in 2012.

-->It is....

10.I haven't had a holiday for five months.

--> It is...

Quá khứ & Hiện tại hoàn thành

1/you have taken part in this English-speaking club since last month.

--> You began...........

2/ She has learned french with foreigners sinve 2005.

--> She started.......

3/ My father hasn't planted trees in the garden for two months.

--> My gather stopped.....

4/ My uncle has taught English for five years.

--> My uncle began....

5/ They haven't produced this kind of for a long time.

--> They stopped....

6/ Snow has dropped in this area since last December.

--> Snow started...

7/ It has not rained since this morning.

--> It stopped.....

8/ The boys have played football since 2 o'clock.

--> The boys began....

9/ Mr.Pike has worked for my boss for five years.

--> mr.Pike started....

10/ This department store has provided us with cheese since last summer.

--> This department store started....

11/ She has not drunk coffee since she was sick last week.

--> She stopped...

12/ I have not visited uncle Tri sinve 2006.

--> I last.....

13/ It's many years since linda last talked to me.

--> The last time.....

14/ We haven't seen mary since we left university.

--> We last...

15/ Long hasn"t wron Jeans since 2004.

--> The last time....

16/ I haven't travelled by plane for a year.

--> I last....

17/ My father gave up smoking cigarettes a month ago.

--> The last time.....

18/ You haven't helped me since you graduated from college.

--> You last....

19/ Mr.Brow stopped teaching English at this school on Jannuanary 10th.

--> The last time...

20/ She hasn't written to John since August.

--> She last...

21/He hasn't visited to his uncle since the beginning of this year.

--> The last time....

22/ I bought these air-conditioners at the beginning of December.

--> I have...