1. What's for lunch?

2. Please listen to what i'm saying

3. I'd like to stay at home tonight. Is there anything interesting on TV?

4. I always go to the city center in our own car on Sunday.

5. Is she different from her dad?

6. What about having a party this weekend?

thank teacher

a) M=\(\dfrac{x^2}{x^2-3x}\)=\(\dfrac{x.x}{x\left(x-3\right)}\)=\(\dfrac{x}{x-3}\)

b)\(\dfrac{x}{x+1}+\dfrac{3x+1}{x^2-1}\)=\(\dfrac{2x^2+4x+1}{x^3+x^2}\)

a)FexOy+yCO→xFe+yCO2

b)+) Quy đổi 8g oxit sắt thành 8g (Fe; O). Khi đó, xảy ra phản ứng với CO

CO  +  O   CO2

=> nCO (phản ứng) = nCO2

+) Lại có: M khí sau phản ứng = 2.d khí/H2 = 40 (g)  ≠ MCO2

=> CO còn dư và O phản ứng hết

=> n hh sau = nCO ban đầu =  = 0,2 (mol)

=> ∆m = m hh sau – mCO bđ = m Oxi (hh rắn) = 40.0,2 – 28.0,2 = 2,4 (g)

=> nCO2 = nO = 0,15 (mol)

=> mFe = 8 – 2,4 = 5,6 (g)

=> nFe = 0,1 (mol) ; nO = 0,15 (mol)  

=> nFe : nO = 2  :3

=> CTPT oxit sắt là Fe2O3

Mặt khác, %V CO2/hh khí sau phản ứng =  . 100% = 75%

a) FexOy+yCO→xFe+yCO2

b) +) Quy đổi 8g oxit sắt thành 8g (Fe; O). Khi đó, xảy ra phản ứng với CO

CO  +  O   CO2

=> nCO (phản ứng) = nCO2

+) Lại có: M khí sau phản ứng = 2.d khí/H2 = 40 (g)  ≠ MCO2

=> CO còn dư và O phản ứng hết

=> n hh sau = nCO ban đầu =  = 0,2 (mol)

=> ∆m = m hh sau – mCO bđ = m Oxi (hh rắn) = 40.0,2 – 28.0,2 = 2,4 (g)

=> nCO2 = nO = 0,15 (mol)

=> mFe = 8 – 2,4 = 5,6 (g)

=> nFe = 0,1 (mol) ; nO = 0,15 (mol)  

=> nFe : nO = 2  :3

=> CTPT oxit sắt là Fe2O3

Mặt khác, %V CO2/hh khí sau phản ứng =  . 100% = 75%

1) Yes I do. In some countries, due to the absence of a welfare system, the only form of assistance that the poor or disabled can receive is from charities. For example, some local charities around provide food, clothing and even educational support to the needy, which really helps them a lot. So without help from charities, these people will have very serious problems.

2) Well, I think they each have a different role to play so I can't say that one is more important than the other

3)I am thinking of joining an international charity dedicated to providing essential medical care to developing countries or a charity that advocates for human rights on a global scale like the World Health Organization. Amnesty International. These charities can help so many people around the world and for me, it's rewarding to think that my donation has helped so many people. In addition, these charities address the basic needs of life that I think everyone is entitled to, so I would definitely choose them.

4)That is an interesting question. I think it's great for kids to get involved in charity work so they can learn how to help people and also understand what it means to be part of a community. However, I don't think this becomes mandatory. When children are forced to do something, they often become resentful and lead to future rejection. If the school could encourage them to give charity as an optional extra-curricular activity, that would be even better and would encourage them to continue helping others as they mature.

I have many hobbies, but I like reading most. Books are always a good friend to me. It is a good way to improve my vocabularies by exposing many new words. By reading, I get better at concentration because it requires me to focus on what I am reading for long periods. It also opens up the knowledge door for me. Reading books tell me about the world's history, let me see the structure of the brain, or bring me a story of Sherlock Holmes. I think reading is one of the most interesting indoors activity.

I playing computer games:))

One day, Alexander Graham Bell was doing an (1) ______experiment_____in his workshop. He was (2) ______careless_____ and spilt some burning liquid onto his clothes. Talking into his telephone, Bell said, “Mr. Watson, I want you to come (3) ______over_____ here immediately, please.” His assistant, Watson was in another room (4) ______far_____ away from the workshop; however he heard Bell (5) ______clearly_____ on his own telephone. Quickly, he ran to Bell’s workshop. “Mr. Bell I heard every sound you said”, Watson shouted (6) ______excitedly_____. Bell has finally (7) ______succeeded_____. He has invented the first telephone. Later other (8) ______inventors_____ made better one.