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14 tháng 8 2022

Trong $FeS_2$ có $\%S=\dfrac{32.2.100}{120}=\dfrac{160}{3}\%$

Trong 320 tấn quặng có $m_S=320.45\%=144$ tấn 

$\Rightarrow m_{FeS_2}=144:\dfrac{160}{3}\%=270$ tấn

$FeS_2\to 2H_2SO_4$ 

Tỉ lệ: cứ 120 tấn $FeS_2$ tạo $98.2=196$ tấn axit 

$\Rightarrow m_{H_2SO_4}=\dfrac{270.186}{120}=441$ tấn 

Thực tế $m_{H_2SO_4}=506,25.80\%=405$ tấn

$\to H=\dfrac{405.100}{441}=91,8\%$

12 tháng 11 2016
 Tôi thích sống ở nông thôn vì một số lý do. Nói với môi trường, đó là một nơi yên bình. Không khí trong lành. Không gian yên tĩnh. Chúng ta có thể thưởng thức các điều kiện tự nhiên khỏe mạnh mà không lo lắng nhiều về ô nhiễm môi trường. Đối với an ninh xã hội, nông thôn là một nơi an toàn hơn so với một thành phố. Trong khi tình hình an ninh đô thị luôn luôn phức tạp với tất cả các loại tội phạm, các khu vực nông thôn là an toàn hơn nhiều bởi vì hầu hết những người đồng hương thân thiện và sẵn sàng giúp đỡ lẫn nhau. Hơn nữa, cuộc sống nông thôn cũng dễ dàng hơn mà ở các thành phố. Người dân ở các thành phố rất dễ bị căng thẳng vì ô nhiễm, áp lực công việc, cuộc thi, vv ... Ngược lại, những điều xấu rất hiếm ở nông thôn. Tóm lại, trừ những vấn đề thu nhập, nông thôn là một nơi cư trú tốt hơn so với các thành phố.
12 tháng 11 2016

bạn nói một hoặc 2 điều xấu hộ mik với

 

2 tháng 11 2016

My neiborhood is not big, but it has a nice view. But, some year recently, people often do not take rubbish into recycle bins, walk on the grass, use more dirty energy, noise pollution,.... So I dislike something much. Althought my neighbor is so dirty, peole here improve themselevs. I like my neighborhood because it's my homeland, the peole here so friendly, there are a lot of parks, supermarkets, schools,... here.

25 tháng 1 2017

I like living in the countryside because of some reasons. Environmentally speaking, it is a peaceful place. The air is fresh. The space is quiet. We can enjoy healthy natural conditions without
worrying much about environmental pollution.

As for social security, the countryside is a safer place than a city. While urban security situation is always complicated with all kinds of crimes, rural areas are much more secure because most of countrymen are friendly and ready to help one another.

Moreover, rural life is also easier that in cities. People in cities are easy to get stressed because of pollution, job pressures, competitions, etc ... On the contrary, those bad things
are very rare in the countryside. To sum up, except income matters, the countryside is a better residence than cities.

30 tháng 10 2016

The house I am living in is situated in the suburb of Hanoi city, within thirty minutes drive off the city center. We have lived there for more than twenty years. This is a fairly large house surrounded with a beautiful garden.

My house consists of four bed-rooms, a living-room, a bathroom with a shower, a dinning-room, a kitchen and a toilet. It is air-conditioned and well-furnished. The living-room is decorated beautifully. Paintings by famous artists are hung on the walls. At night, the color neon lights increase the beauty and coziness of the room. There, on Sundays and holidays my father usually spends his time playing chess or drinking tea with his friends. My mother and my younger sisters are kind and hard-working women. They often keep the house clean and tidy.

On hot days of summer, we usually take meals in the garden, under a big tree. It is fairly cool and quiet here. We enjoy our meals in the melodious twitters of birds. On stormy and rainy nights, all family members gather in the living-room, watching television or telling each other about their daily activities.

I love my house very much because it is the place where I was born and have grown up in the education of my father and in the tender loving care of my mother. I have spent my whole childhood in the love and affection of my dear ones with so many sweet memories.

Chúc bn hok tốt nha!!!!!

16 tháng 11 2017

The house I am living in is situated in the suburb of Hanoi city, within thirty minutes drive off the city center. We have lived there for more than twenty years. This is a fairly large house surrounded with a beautiful garden.
My house consists of four bed-rooms, a living-room, a bathroom with a shower, a dinning-room, a kitchen and a toilet. It is air-conditioned and well-furnished. The living-room is decorated beautifully. Paintings by famous artists are hung on the walls. At night, the color neon lights increase the beauty and coziness of the room. There, on Sundays and holidays my father usually spends his time playing chess or drinking tea with his friends. My mother and my younger sisters are kind and hard-working women. They often keep the house clean and tidy.
On hot days of summer, we usually take meals in the garden, under a big tree. It is fairly cool and quiet here. We enjoy our meals in the melodious twitters of birds. On stormy and rainy nights, all family members gather in the living-room, watching television or telling each other about their daily activities.
I love my house very much because it is the place where I was born and have grown up in the education of my father and in the tender loving care of my mother. I have spent my whole childhood in the love and affection of my dear ones with so many sweet memories.

I was born and grown up on the poor land in Duc Tho district, Ha Tinh province. That’s where deeply attaches to me 24 years of life. If anyone who asks me that “What’s the thing your most proud of?” .I will answer that’s my hometown. Duc Tho is the land poor where the people live by rice cultivation, breeding, and fishing. Although the life is very difficult, but the people is very friendly, and studious. In Duc Tho, there is a Tung Anh village where called “Doctor village”. Duc Tho is also the home of Tran Phu Secretary General, and marked many memories of the great leader Ho Chi Minh.

If you come to Duc Tho, you will feel many interesting things, visiting Tran Phu tombstone, La Giang dyke, rowing on La driver, and enjoying the traditional songs. In the evening, they can enjoy a special food which is “mussel rice” – just only eat one time, you will never forget.

Beautiful and unobtrusive! Duc Tho always tries to grow, and to improve the life of people, but keeping the traditional culture.

6 tháng 11 2018

I was born and grown up on the poor land in Duc Tho district, Ha Tinh province. That’s where deeply attaches to me 24 years of life. If anyone who asks me that “What’s the thing your most proud of?” .I will answer that’s my hometown. Duc Tho is the land poor where the people live by rice cultivation, breeding, and fishing. Although the life is very difficult, but the people is very friendly, and studious. In Duc Tho, there is a Tung Anh village where called “Doctor village”. Duc Tho is also the home of Tran Phu Secretary General, and marked many memories of the great leader Ho Chi Minh.

If you come to Duc Tho, you will feel many interesting things, visiting Tran Phu tombstone, La Giang dyke, rowing on La driver, and enjoying the traditional songs. In the evening, they can enjoy a special food which is “mussel rice” – just only eat one time, you will never forget.

Beautiful and unobtrusive! Duc Tho always tries to grow, and to improve the life of people, but keeping the traditional culture.

6 tháng 11 2018

I was born and grown up on the poor land in Duc Tho district, Ha Tinh province. That’s where deeply attaches to me 24 years of life. If anyone who asks me that “What’s the thing your most proud of?” .I will answer that’s my hometown. Duc Tho is the land poor where the people live by rice cultivation, breeding, and fishing. Although the life is very difficult, but the people is very friendly, and studious. In Duc Tho, there is a Tung Anh village where called “Doctor village”. Duc Tho is also the home of Tran Phu Secretary General, and marked many memories of the great leader Ho Chi Minh.

If you come to Duc Tho, you will feel many interesting things, visiting Tran Phu tombstone, La Giang dyke, rowing on La driver, and enjoying the traditional songs. In the evening, they can enjoy a special food which is “mussel rice” – just only eat one time, you will never forget.

Beautiful and unobtrusive! Duc Tho always tries to grow, and to improve the life of people, but keeping the traditional culture.

Bài dịch

“Tôi sinh ra và lớn lên trên miền đất nghèo thuộc huyện Đức Thọ, tỉnh Hà Tĩnh. Đó là nơi gắn bó với tôi 24 năm cuộc đời. Nếu có ai hỏi tôi rằng “Điều gì làm tôi tự hào nhất?”. Tôi sẽ trả lời đó chính là quê hương tôi. Đức Thọ là mảnh đất nghèo, người dân ở đây sống bằng nghề trồng lúa, chăn nuôi và đánh cá. Mặc dù cuộc sống vất vả, nhưng con người ở đây rất thân thiện và hiếu học. Đức Thọ có một ngôi làng Tùng Ảnh, được gọi là làng tiến sỹ. Đức Thọ cũng chính là quê hương của cố tổng bí thư Trần Phú, và đã ghi nhiều dấu ấn của lãnh tụ Hồ Chí Minh vĩ đại.

Nếu đặt chân đến Đức Thọ, bạn sẽ cảm nhận được nhiều điều thú vị, đi tham quan mộ cố tổng bí thư Trần Phú, đê La Giang, chèo thuyền trên sông La, và nghe câu hò ví dặm. Khi hoàng hôn xuống, cùng nhau thưởng thức cơm hến – một đặc sản ẩm thức chỉ ăn một lần là nhớ.

Đẹp và bình dị ! Đức Thọ luôn luôn cố gắng để đổi mới, cải thiện đời sống nhân dân, nhưng luôn giữ gìn bản sắc quê hương đậm đà’’.

Đó là đoạn văn tiếng anh của tôi viết về nơi tôi sống, và thông qua đoạn văn này tôi muốn gửi gắm tình yêu tha thiết đối với quê hương nghèo khó nhưng nghĩa tình. Còn bạn ? Hãy viết một đoạn văn giới thiệu bản thân bằng tiếng anh với chủ đề về nơi mình sinh sống và đừng quên chia sẻ với Aroma nhé !

4 tháng 11 2018

My neiborhood is not big, but it has a nice view. But, some year recently, people often do not take rubbish into recycle bins, walk on the grass, use more dirty energy, noise pollution,.... So I dis something much. Althought my neighbor is so dirty, peole here improve themselevs. I my neighborhood because it's my homeland, the peole here so friendly, there are a lot of parks, supermarkets, schools,... here.

14 tháng 5 2020

i think my city where i live will be diferent in 200 years later . there will be more robot to help everybody in my city , there wil be more smart vehicle on the street . i think that there will be more green tree because in the future there will be more high-tech gadgets to do that . I think 200 years later humans will live peacefully with robots so there will be no crimal in where i live and the world . In short 200 years later the world where we live will be better than now

cái này là anh tự nghĩ nha em nên có sai sót mong em thông cảm

15 tháng 5 2020

Thank you very much

22 tháng 11 2016

Hello, today I will tell you what I think about city under the sea. It's very big and clean. The people are very friendly and kind. They are living sociable with each other. It has a big palace, fresh air, modern machine, modern street.... It will be famous tourist attraction and many people will know about it. Though only in my mind but I hope something I think today will be the truth. I like it very much

Dịch nghĩa

Xin chào, hôm nay tôi sẽ cho bạn biết những gì tôi nghĩ về thành phố dưới đáy biển. Nó rất lớn và sạch sẽ. Người dân rất thân thiện và tốt bụng. Họ đang sống hòa đồng với nhau. Nó có một cung điện lớn, không khí trong lành, máy móc hiện đại, đường phố hiện đại .... Nó sẽ là địa điểm du lịch nổi tiếng và nhiều người sẽ biết về nó. Mặc dù chỉ có trong tâm trí của tôi, nhưng tôi hy vọng một cái gì đó tôi nghĩ rằng hôm nay sẽ là sự thật. tôi rất thích nó

Bài viết :

I live in the suburbs of Nha Trang city. There are many good things about

living in my neighbourhood. First, it has beautiful parks, sandy beaches,

and sunny weather all year. So, it's very good for outdoor activities and

events. Second, the traffic here is also great because the roads are wide

and people follow the traffic lights very well. Also, my neighbours are

incredibly friendly and helpful. You can make friends with them and ask

them for help easily. However, there is one thing I don't about living

here. It's quite inconvenient because if you want to hear some live music

or watch a movie at the cinema, you have to catch a bus to the city centre.

Despite that, I still love living here.

Bài dịch :

Mình sống ở vùng ngoại ô của thành phố Nha Trang. Có nhiều điều tốt

đẹp khi sống ở đây. Đầu tiên là những công viên xinh đẹp, những bãi biển

đầy cát và thời tiết ở đây thì nắng đẹp quanh năm. Vì thế, rất thích hợp

cho các hoạt động ngoài trời. Thứ hai, giao thông ở đây cũng rất tuyệt vì

đường phố rất rộng rãi và người dân thì rất tuân thủ luật giao thông.

Ngoài ra, người dân sống ở đây cũng rất thân thiện và tốt bụng. Bạn dễ

dàng kết bạn với họ và nhờ họ giúp đỡ. Tuy nhiên, có một điều mình

không thích khi sống ở đây. Đó là khá bất tiện vì nếu bạn muốn nghe ca

nhạc hay xem phim ở rạp, bạn phải bắt xe buýt tới trung tâm thành phố để

xem. Tuy bất tiện là vậy, nhưng mình vẫn rất thích sống ở đây

4 tháng 12 2019

   Bạn tham khảo nhé:

Tả về người thân của mình bằng tiếng anh:

  My mother is the one who I love most in my life. For what she’s done, she deserved with the whole world. My mother is a 43-year-old household wife. She’s tall, slim and especially she has a beautiful long black hair. She always smile thus everyone consider her a friendly person. My mom loves every members of the family with all her heart. She agreed to be a household woman instead of working out. My mother takes care of the household chorces. She wakes up earliest in the morning and goes to bed latest in the night. And during the day, she’s very busy. I remember once when my mother got sick so nobody did the house work and everything went to crazy. From then, my father and I join hand to help mother whenever we have free time. She’s really happy about that. When I was a kid, mom taught me to play piano at each weekend. I still remember the songs which includes many childhood’s experiences. Not only taught me to play piano, she also taught me to be a better human. I love the moral stories that she told me before I fell asleep every night. We’re really appreaciate mother’s effort, patient and her hard work to conserve the family’s happiness. My mother is an indispensable part of my life. When I grow up, I want to be a woman her.

I was born and grew up in a small village of DAI TU district, in THAI NGUYEN province. It is about 150 km from here.

It is a small village because it has only a population of 1000 with a size of 3 square kilometers

There is a  primary school in the village, so it is very convenient for children to go to school. There is a small market with a lot of fresh food. The food here is cheaper and fresher than the one in the city.

My village has some nice view, such as: large fields where we can fly a kite and Cau river, where I could swim and my mother usually wash clother there.

Centre of my village is a khuon ga pagoda, it has a large yard,where we usually play badminton, tabletenis or meet each other to chat, next to the pagoda is a large lake. I going fishing here very much.

Especially, I tea of my hometown a lot, because it very delecious, I usually drink a cup of tea before I start working.

The people in my village are very hospitable, friendly, helpful and generous. They are all hard working people. They mainly live on farming and business…

Being a learner of Tran quoc Tuan university, I only come home once a month , so I miss my hometown very much.

Life in the city is full of activity. Early in the morning hundreds of people rush out of their homes in the manner ants do when their nest is broken. Soon the streets are full of traffic. Shops and offices open, students flock to their schools and the day’s work begins. The city now throb with activity, and it is full of noise. Hundreds of sight-seers, tourists and others visit many places of interest in the city while businessmen from various parts of the world arrive to transact business.

Then towards evening, the offices and day schools begin to close. Many of the shops too close. There is now a rush for buses and other means of transport. Everyone seems to be in a hurry to reach home. As a result of this rush, many accidents occur. One who has not been to the city before finds it hard to move about at this time. Soon, however, there is almost no activity in several parts of the city. These parts are usually the business centres. With the coming of night, another kind of actịvity begins. The streets are now full of colorful lights. The air is cooler and life becomes more leisurely. People now seek entertainment. Many visit the cinemas, parks and clubs, while others remain indoors to watch television or listen to the radio. Some visit friends and relatives and some spend their time reading books and magazines. Those who are interested in polis discuss the latest polial developments. At the same time, hundreds of crimes are committed. Thieves and robbers who wait for the coming of night become active, and misfortune descends upon many. For the greed of a few, many are killed, and some live in constant fear. To bring criminals to juse, the officers of the law are always on the move.

Workers and others who seek advancement in their careers attend educational institutions which are open till late in the night. Hundreds of them sit for various examinations every year. The facilities and opportunities that the people in the city have to further their studies and increase their knowledge of human affairs are indeed many. As a result, the people of the city are usually better informed than those of the village, where even a newspaper is sometimes difficult to get.

The city could, therefore, be described as a place of ceaseless activity. Here, the drama of life is enacted every day.

My neiborhood is not big, but it has a nice view. But, some year recently, people often do not take rubbish into recycle bins, walk on the grass, use more dirty energy, noise pollution,.... So I dis something much. Althought my neighbor is so dirty, peole here improve themselevs. I my neighborhood because it's my homeland, the peole here so friendly, there are a lot of parks, supermarkets, schools,... here.

hc tốt