Make the dialogue about natural diaster (2 people)
MỌI NGƯỜI UI! LÀM LIỀN NHOA, MÌNH CẦN GẤP, MAI THI ÙI!! :(
Cho 17,2g hỗn hợp gồm Ca và CaO tác dụng với nước dư thu được 3,36l khí H2 ở đktc.
a)Tính khối lượng mỗi chất trong hỗn hợp
b)Khối lượng sản phẩm thu được
Mọi người ui, mình cần gấp lắm nên mn giải liền nhoa. Mai thi rùi :(( PLS!!!
\(a) Ca + 2H_2O \to Ca(OH)_2 + H_2\\ CaO + H_2O \to Ca(OH)_2\\ n_{Ca} = n_{H_2} = \dfrac{3,36}{22,4} = 0,15(mol)\\ m_{Ca} = 0,15.40 = 6(gam)\\ \Rightarrow m_{CaO} = 17,2 - 6 = 11,2(gam)\\ b) n_{Ca(OH)_2} = n_{Ca} + n_{CaO} = 0,15 + \dfrac{11,2}{56} = 0,35(mol)\\ m_{Ca(OH)_2} = 0,35.74 = 25,9(gam)\)
LÀM ĐỐI THOẠI 2 NGƯỜI Pollution
Mọi người ui! Mai tớ thi rùi, nên mn làm liền cho tớ đi:((
viết về :
1) talk about the roles of schools in the future
2) Talk about some ways to improve your english
mọi người giúp mình sớm được kh ạ mai mình thi nói r mà kh biết làm sao với lại làm ngắn gọn được kh ạ trí nhớ mình kh đc tốt học dài mau quên lắm ạ! cảm ơn nhiều ạ
Câu 5 làm hộ mk nhá cần gấp mai thi nhoa cám ơn các bạn :))
\(=>5.4200\left(t2-35\right)=315000=>t2=50^OC\)
Topic talk about the festival you know (cần gấp) Giúp mình với mai mình thi rồi
REFER
The flower race on the river in my hometown is held in the first spring of the year. Today, the sky is clear. Hundreds of flowers race each other to bloom under the warm sun. People went to see the festival in large numbers. The two sides of Tra Giang River are bustling. Everyone is looking forward to the race. The racing boats are beautifully decorated, so are the flags. The operators on the boat were strong, muscular and agile guys. When hearing the whistle-blowing effect of the organizers, everyone turned their eyes forward. When receiving the "start" command, the Ao Dai rushes quickly, the riders are quick, non-stop. Water splashed, drums urged “Tung! Tung! Tung "resounds. The audience cheered with applause. Laughter, voices calling each other make the festival scene very lively.
THAM KHẢO:
Halloween is a holiday celebrated on October 31st. The most common colors of the day are orange and black. Halloween comes from the ancient Celtic festival Samhain. The ancient Celts believed that on October 31st, now known as Halloween, the boundary between the living and the deceased is not clear, and the dead become dangerous for the living by causing problems such as sickness or damaged crops. On Halloween, the ancient Celts would place a skeleton by their window to represent the dead. Believing that the head was the most powerful part of the body, containing the spirit and knowledge, the Celts used the "head" of the vegetable to decorate their houses. On this day people often wear strange clothes as characters in horrible novels or movies to frighten others. People usually like to dress as ghosts, skeletons, or witches. Now Halloween is an official holiday in almost all European countries.
refer
Halloween is a holiday celebrated on October 31st. The most common colors of the day are orange and black. Halloween comes from the ancient Celtic festival Samhain. The ancient Celts believed that on October 31st, now known as Halloween, the boundary between the living and the deceased is not clear, and the dead become dangerous for the living by causing problems such as sickness or damaged crops. On Halloween, the ancient Celts would place a skeleton by their window to represent the dead. Believing that the head was the most powerful part of the body, containing the spirit and knowledge, the Celts used the "head" of the vegetable to decorate their houses. On this day people often wear strange clothes as characters in horrible novels or movies to frighten others. People usually like to dress as ghosts, skeletons, or witches. Now Halloween is an official holiday in almost all European countries.
Make a dialogue for 3 people to talk about the most popular healthy broblem
General conversation between old friends
John:- Hello peter, I haven't seen your brother in almost ten years. What's he doing with himself?
Peter:- He's not doing anything at the moment he's not doing too well.
John:- I am so sorry to hear that what's the matter with him?
Peter:- Well about six years ago, he started to complain that he was weak all the time.
John:- So what is it due to? Old age or is he sick.
Peter:- I think it is a mixture of both. We have been to many doctor's and they can't find anything wrong with him. He thinks it is because when he was younger he didn't take care of himself.
John:- That makes a lot of sense. I have always tried to live a healthy lifestyle since I was young.
Peter:- That's what my brother tells me now every time I see him.
John:- Well, please tell him I was asking about him and he starts feeling better.
Peter:- Thanks John. I'll pass on your regards to him when I see him next.
ai làm dùm mình cần gấp lắm mong mọi người làm mình sắp đi thi làm gấp ạ !
Topic 1: talk about pollution and how to reduce
Topic 2: talk about an English speaking country
Topic 3: talk about one of natural diaster anh how to prepare for them
Topic 4: talk about the ways to communicate nơ anh in the futute
Topic 5:what are the advantages and disvantages of science and technology
ai viết giúp mình với. đề nào cũng được.
Ngắn thôi nha. tầm 500-700 từ.
topic1
1.Walk or ride your bike whenever possible. One of the best things you can do to help stop pollution is to stop using your car for short trips. If the weather is nice and you don’t have too far to go, consider walking or riding your bike. You will help reduce air pollution and you will get some exercise and fresh air in the process
2.Use public transportation. Riding the bus, train, or subway is another great way to avoid using your personal vehicle and reduce carbon emissions. If you have access to good public transportation where you live, take advantage of it. Since you won’t have to worry about keeping your eyes on the road, you can take advantage of the time to read, catch up on news, or just relax.
Mọi người ui, giúp mình câu này với nhé !!
(-1)+2+ (-3)+4+...+(-99) +100
Help me !! Mai mình thi rồi nên là Please
số các số hạng là:(|100|-|-1|):1+1=100(số hạng)
chia tổng đó thành 50 nhóm
(-1)+2+ (-3)+4+...+(-99) +100
=[(-1)+2]+[(-3)+4]+...+[(-99)+100]
=1+1+.....+1
=1.50=50