Cho 5,5 gam hỗn hợp gồm Al và Fe tác dụng với 200 gam dung dịch H2SO4 loãng dư. Sau phản ứng thu được 4,48 lít khí H2 (đktc). a. Tính thành phần % theo khối lượng mỗi kim loại trong hỗn hợp . b. Tính nồng độ phần trăm của dung dịch muối nhôm trong dung dịch thu được?

a. Cho hỗn hợp A gồm các kim loại đồng và nhôm vào cốc chứa một lượng dư dung dịch HCl, sau phản ứng thu được 20,16 lít khí H2 (đktc) còn 6,4 g chất rắn không tan.Tính % khối lượng của nhôm trong hỗn hợp? b. Cho hỗn hợp đồng và nhôm đó vào dung dịch H2SO4 đặc, nguội, dư thu được V lít SO2 đktc. Tính V? Câu 2:Cho 5,5 gam hỗn hợp gồm Al và Fe tác dụng với 200 gam dung dịch H2SO4 loãng dư. Sau phản ứng thu 

giúp mik vs ạ,mik cảm ơn nhiu

1. Shall we surf the net for the location of NinhBinh Province? (SUGGEST)
=>I __________________________________________

2. I’m interested in the news about ancient towns. (FIND)
=>I _____________________________________________

3. “When are you going to submit your research paper?” my teacher asked me.

=>My teacher _______________________________________

2.  My mother no longer cooked for me since I married my wife. (USED)
 =>_________________________________________________

5.   It took me 4 hours to read the first chapter of the book. (SPENT)
 =>_________________________________________

6. This performance is much more fascinating than the last one.

=>The last performance was not _____________

Spending your free time on the Internet can be fun. You can chat, share photos with friends, and play online games. But some people are addicted to the Internet. They just can’t turn it off. Being online for many hours at a time does not mean you have a problem. The Internet is very useful. Online, you can pay your bills, buy clothes, and read the news. There are many good reasons to spend time online. However, people with an Internet addiction are online too much.They don’t spend time with their friends and family. Instead, they spend their time chatting withtheir Internet friends, people they have never met in real life. Some also play online games all day or night. Some people with Internet addictions even leave their jobs so they can spend even more time online! People with Internet addictions don’t just go online to shop, have fun, or do work. People who have this problem often go online because they want to escape the stress and problems

In their lives, many internet addicts stop caring about their real lives and focus only on their online lives. One way Internet addicts can get help is by using special software. This software controls how much time someone can spend online. It tells the computer to turn off the internet after a certain amount time. This helps people focus on real life. The software’s goal is to teach people to use the Internet for good reasons and not just as an escape.

1. People with Internet addiction spend most of their free time on the Internet.

2. Paying bills online is a useful way to use the Internet.

3. Internet addiction causes problems in one’s daily life.

4. Most Internet addicts play online games all day or night.

5. Using special software is a way of helping people stop their Internet addiction.

6. What is the main idea of the article?

A. People should not spend time on the Internet.

B. The Internet is very good for people.

C. Spending too much time online is not good.

D. Families should use the Internet together.

7. Which is NOT a problem for people with Internet addiction?

A. They stop spending time with their family.     B. They learn to type very fast.

C. They might lose their jobs.                                                 D. They stop caring about their real lives.

8. According to the passage, a person is most likely to become an Internet addict if _______.

A. their life is stressful and has problems            B. their job is boring

C. they enjoy online gaming                       D. they have a lot of online friends

giúp mik vs mik dag cần gấp,cảm ơn

      Ha Long Bay is a UNESCO World Heritage Site and popular travel (1)_____________inQuangNinh Province, Vietnam. The bay features thousands of limestone karsts and isles in (2) _____________  shapes and sizes. Ha Long Bay is a center of a larger zone which (3) _____________ BaiTu Long Bay to the northeast, and Cat Ba Island to the southwest.
      Ha Long Bay has an area of around 1,553km2, including 1,960 - 2,000 islets, most of(4)_____________ are limestone. The core of the bay has an area of 334km2 with a high density of775 islets. The limestone in this bay has gone through 500 million years of (5)_____________ in different conditions and environments. The evolution of the karst in this bay has taken20 million years (6)_____________  the impact of the tropical wet climate. The geo-diversity of the environment in the area has created (7)_____________ , including a tropical evergreen biosystem, oceanic and sea shore biosystem. Ha Long Bay is (8) _____________ to 14 endemic floral species and 60 endemic faunal species.
1.   a. situation               b.destination        c. direction            d. ground
2.   a. various                 b.complex                      c. exciting            d. original
3.   a. offers                    b.includes             c. consists         d. covers
4.   a. them                     b.those                           c. which                         d. whom
5.   a. formation             b. foundation                 c.establishment              d. contribution
6.   a. in                          b. of                               c.for                               d. under
7.   a. biochemical    b. biodiversity            c.bioconversion   d. biodefense
8.   a. way                      b. place                                    c.home                        d. house

giúp mik vs mik dag cần gấp

1. She went back to live with her mother ____________she did not earn enough money to live in her own house.

A.   although                    B. so that             C. in order to        D. because

2. The trip to the National Gallery has been________________ until next Friday.

A.   put off                       B. looked into      C. turned up                  D. found out

3. “ _______________?” “Everything is fine. How about you?”

A. How old are you?  B. How’s it going? C. What’s your life?  D. What’s the matter?

4. Life in Ho Chi Minh City is_________ than we thought at first.

A. far the busier             B. the more busier         C. much more busy                 D. much busier

5. Studies show that having good conflict ____________ skills is associated with various positive outcomes.

A.   resolutional     B. resolving          C. resolve             D. resolution

6. For most of us, however, positive thinking and ___________ can be learned.

A.   self-awareness           B. self-abuse         C. self-access        D. self-analysis

7. I met James in a restaurant on Friday and he said that he had seen Caroline there_____________.

A. the day before           B. this day                     C. today                         D. that day

8. Jane said that she _________ come and look after the children the following day.

A. can                                      B. will                            C. could                D. should

 I suggest you_____________ Ha Long Bay. It’s very picturesque.
A. to visit                                B.visiting             C.visited             D. should visit
10. A: You really must go to Hoi An to enjoy the full moon at Mid-autumn Festival.
      B:_____________ .

6. A. Yes, that’s what I’ve heard.        B. Do you really know about it?
C. Yes, I won’t go there.                  D. No, thank you.

11.I wish I have his mobile phone number so that we could tell him the good news.
               A                                                           B              C                                      D

12.  It is thought that the first temple was built at the current site in the 15th century.
               A                                          B           C                            D

giúp mik vs mik dag cần gấp