Cho 5,9 gam amin đơn chức X tác dụng vừa đủ với dung dịch HCl, Sau khi phản ứng xảy ra hoàn toàn thu được dung dịch Y. Làm bay hơi dung dịch Y được 9,55 gam muối khan. Số công thức cấu tạo ứng với công thức phân tử của X là:

Cho m gam hỗn hợp bột Zn và Fe vào lượng dư dung dịch CuSO₄. Sau khi kết thúc các phản ứng, lọc bỏ phần dung dịch thu được m gam bột rắn. Thành phần phần trăm theo khối lượng của Zn trong hỗn hợp bột ban đầu là:

It is something that tests your skill or ability to do something. It is usually a difficult task.

What is it?

It is a process through which the teacher learns how much you have understood what you were taught. It can be tested in written form or verbally. What is it?

It is a small amount of food and drink. It is usually provided as a light snack at a meeting and not as a meal. What is it?

It is an upright flat structure made of stone or brick. It divides one area from another. You can hang a picture or clock on it. What is it?

Cho các chất sau:MÃ:

      X: H₂N – CH₂ – COOH

      Y: H₃C – NH – CH₂ – CH₃.

      Z: C₆H₅ – CH(NH₂) – COOH.

      G: HOOC – CH₂ – CH(NH₂) – COOH.

      P: H₂N – CH₂ – CH₂ – CH₂ – CH(NH₂) – COOH.

      T: CH₃ – CH₂ – COOH.

      Những chất thuộc loại aminoaxit là:

You do this when you want to remove something that you have written down or stored in your computer. You are _______ it.

You stick something to something else with glue.

 Kim loại M có thể được điều chế bằng cách khử ion của nó trong oxit bởi khí hidro ở nhiệt độ cao. Mặt khác kim loại M có thể tác dụng với dung dịch H₂SO₄ loãng giải phóng H₂. Vậy kim loại M là:   

You feel unhappy and worried when something unpleasant or disappointing has happened.

You feel ________ .

It is made of rope. You fasten it to your dog’s collar in order to control your dog outside and not lose your dog. What is it?

It is part of a door. You turn it to open the door. What is it?

Read the homework list. Anwser the questions

TODAY’S HOMEWORK

Mon., June 23, 2014

Bring a calculator for your math class on Wednesday.

Find definitions for the new words in the word list on p. 56 of your English textbook.

Write a book report by this Friday.

Prepare for the history quiz tomorrow.

You need a calculator for ____________________

When is the book report due?

What will happen at school tomorrow?

What is the English homework?

Dear Elisabeth,

            I have just finished writing my first draft of the book report for our book club. The teacher told us it would be helpful if we read each other’s reports and share feedback. She also mentioned that it would give us more ideas for the final draft. So I was wondering if we could read each other’s book reports and share some ideas before the next class.

            Let me know what you think about this. See you tomorrow at school.

            Your best friend,

            Rosa

Why did Rosa write a letter?

What is true about Rosa?

Dear Grandpa,

            Yesterday was Earth Day and I learn how to save the earth at school. I never knew that plastic didn’t decay for so many years. I use PET bottles and paper cups every day, and now I realizeI have been making so much waste every day. I also learn how to recycle, so I made this pretty postcard with a tissue box to write this message to you.

            Christmas is coming soon, I can’t wait to visit you. See you soon.

            Best wishes,

            Helena.

What did Helena learn yesterday?

Cho dung dịch Na₂CO₃ vào dung dịch Ca(HCO₃)₂ thấy:

What did Helena make?

Thực hiện các thí nghiệm sau:

(1)   Đốt dây sắt trong khí clo.

(2)   Đốt nóng hỗn hợp bột Fe và S (trong điều kiện không có oxi).

(3)   Cho FeO vào dung dịch HNO₃ (loãng dư).

(4)   Cho Fe vào dung dịch Fe₂(SO₄)₃.

(5)   Cho Fe vào dung dịch H₂SO₄ (loãng, dư).

      Có bao nhiêu thí nghiệm tạo ra muối sắt(II)?

Read the instructions. Answer questions

There are many ways to reduce, reuse and recycle to save the earth.

Bring your own bags instead of using plastic shopping bags when shopping at the supermarket.

Use the rechargable batteries.

Use your own reusable water bottle at school instead of using plastic PET bottles.

Turn the faucet off to not let the water run when you are brushing your teeth or rubbing your hands with soap.

Turn off the lights and pull out plugs when you are not using any electricity.

Recycle every day. Sort your paper, plastic, and glass waste.

Walk or ride a bike to reduce greenhouse gases. Walking or riding a bike can be good exercise, too.

Use a hankerchief or washable towels instead of paper towels or napskins.

Keep the temperature moderate. Using the air conditioner or heater too much requires a lot of energy.

Use your own mug or cup instead of paper cups.

Exchange unwanted items with your friends or sell them at a garage sale.

Use both sides of a sheet of paper. Many people use only one side of a sheet of paper and throw it away. You don’t need new sheets of paper just to make some notes.

We should use __________________ instead of paper cups.

What is a benefit of walking or riding a bike?