Doing household chores as well as sharing household chores has many advantages. Firstly, when all family members share the housework together, it helps us get closer and reduce burden for the mothers. Secondly, doing household chores helps children a lot, too. They will become more sociable, more active and care more about others and they will also learn to take care of their family. Thirdly, when men share the housework, they tend to have a better relationship with their wives. That would be a great example for their children to follow. Finally, doing housework brings knowledge organization of things, especially children. They will know how to keep their belongings tidied and everything kept clean as well. In conclusion, most people think the housework is only for women; however, all of us should share the household chores due to all reasons mentioned above.

#Tham khảo!

Sau khi đọc xong, em thấy rất ức chế, phê phán về những hành động của con người. Ít ra họ còn có một chút ý thức , nhưng " không " họ vẫn cứ tiếp tục làm vậy, vẫn xả rác ra môi trường bừa bãi và họ còn vứt xác động vật chết  ra những nơi đất trống .Em gặp được trường hợp này ngoài thực tế thì em sẽ lập tức báo với nhà nước để nhà nước có những biện pháp trừng trị. Không để hành vi này diễn ra thêm một lần nào nữa. Và để con người không vi phạm , em với bạn bè treo những thông điệp để con người khi nhìn vào và thực hiện.

-Suy nghĩ của em:

-Em thấy ý thức của người dân ở khu vực đó còn chưa cao, làm ô nhiễm môi trường trầm trọng. Rác thải và xác động vật chết chất  đống lâu ngày sẽ thối rữa, bốc mùi, gây ảnh hưởng đến sức khoẻ và sinh hoạt của mọi người,nó có thể gây ô nhiễm nguồn nước sinh hoạt và còn gây ra các tác hại khác. Chúng ta nên có ý thức giữ gìn cảnh quan, môi trường hơn,...

Like everyone, I have my private hobbies. I have many hobbies such as watching horror films, reading novels, listening to music e.t.c But I like traveling best. Firstly, when I have to study or work too much, I usually feel tired and bored,so I want to refesh myself and travelling is a good way for me to relax.Secondly, travelling helps me widen my knowledge because I can pick up a lot of different cultures and study so much from them.Besides,I can learn foreign languages when I travel abroad. On the other hand, travelling makes my life more interesting because I can meet lots of people all over the world and make new friends.Finally, I can admire true beauty and enjoy it when I go to different places. However, it's hard for me to travel abroad because I'm always busy studying and I don't have much money.To sum up, I love travelling very much because it not only cheer me up but also keep my eyes open

OH

Quy đổi hỗn hợp X thành \(\left\{{}\begin{matrix}Ba\\Na\\O\end{matrix}\right.\) với nBa = x mol, nNa = y mol và nO = z mol

nH₂ = 1,12 :22,4 = 0,05 mol

\(\left\{{}\begin{matrix}Ba\\Na\\O\end{matrix}\right.\)  +  H₂O  →  \(\left\{{}\begin{matrix}Ba\left(OH\right)_2\\NaOH\end{matrix}\right.\) +  H₂ 

Ta có nBa(OH)₂ = 20,52: 171 = 0,12 mol

Bảo toàn nguyên tố Ba => x = 0,12 mol

Áp dụng ĐLBT electron và BTKL ta có \(\left\{{}\begin{matrix}y+0,12.2=2z+0,05.2\\0,12.137+23y+16z=21,9\end{matrix}\right.\)

=> y = 0,14 và z = 0,14 

a) BTKL => nNaOH = nNa = 0,14 mol

b) nOH^- trong dung dịch Y = 0,12.2 +0,14 = 0,38 mol

nCO₂ = 6,72:22,4 = 0,3 mol

Ta có \(\dfrac{nOH^-}{nCO_2}\) = 1,26 => tạo 2 muối HCO₃^- và CO₃^2-

CO₂  +  OH^-  →  HCO₃^-

0,3     0,38(dư)     0,3

OH^-   +  HCO₃^-   → CO₃^2-   +  H₂O

0,08        0,3            0,08

CO₃^2-   +  Ba²⁺  →  BaCO₃

0,08           0,12 --->  0,08

Vậy mBaCO₃ = m kết tủa = 0,08.197 = 15,76 gam

Cách 2

\(\left[{}\begin{matrix}Na\\Ba\\Na_2O\\BaO\end{matrix}\right.\)  +   H₂O  →  \(\left\{{}\begin{matrix}Ba\left(OH\right)_2\\NaOH\left(xmol\right)\end{matrix}\right.\)  +  H₂ 

Tổng số mol H sau phản ứng = 2nBa(OH)₂  +  nNaOH  + 0,05.2 = (0,34 +x) mol

=> nH₂O phản ứng = 0,17 + 0,5x mol

Áp dụng ĐLBT khối lượng => 21,9 + (0,17 + 0,5x).18 = 20,52 + 40x + 0,05.2

=> x = 0,14 

Đến đây em giải tiếp tương tự cách 1

hello every body.My name is  Tu . My hobby is very unusual ,it is knitting. My mother takes me to that hobby.I usually knitting with my grandma because my mom is very busy . I started it 2 years ago . I think it's a active way to improve my imagination . I am not good at knitting so much so i practise it everyday . For me knitting is  a way for me to make more new friends who have the same hobby . The scafts i knit , i usually give to my family as some presents .In the future , i will countinue that hobby because when i knit , all i need is time

KO DK HAY LẮM MONG BN THÔNG CẢM

NHỚ TK CHO MÌNH

A hobby that I enjoy is using the computer. Surfing the internet is what I usually do whenever I have free time.

No one can deny the benefits of Internet. Information resources are probably the biggest advantage that Internet offers to people. Internet is a wonderful source of information. All kind of information on any topic is available on the Internet at anytime. I love searching things on Google. It’s a very useful tool from the Internet, we can know everything with just one mouse click.

Becoming knowledgeable is also a great benefit of using Internet. I spend a lot of time on the Internet for reading news. All latest news is continuously up-to-date on the Internet on various news sites. I often visit E-newspaper websites to read hot daily news. I can know everything such as current issues that happen in this world, what happen to our country, celebrities life, recent fashion, and other news that can enhance my knowledge. I would rather using Internet for updating news because it is available everywhere at anytime.

In conclusion, people increasingly spend their leisure time using Internet because it is a helpful tool where people can learn new things and keep informed of information around the world. Internet turns the world into the speed generation. As the Internet saves us much time, we can have enough time to do other things. The internet is a marvelous creation in this generation.

In the past, my eating babit is quite healthy. For breakfast, I usually have a bowl of cereal, a glass of milk and some fruit. Additionally, I prepare a lunch box on her own instead of buying fast food at school canteen. In the evening, I often eat more vegetables and reduces the amount of meat. I believe that eating healthily means that I should follow a balanced diet and avoid junk food. Research shows that reasonable eating habits not only boost our willpower but also improve our performance at work