giải bài 13 giùm mình Bài 13: Đốt cháy hoàn toàn 23g một rượu no đơn chức A, thu được 44g CO2 và 27g H,O. a/ Xác định CTPT, CTCT của A b/ Hỗn hợp X gồm A và B là đồng đăng của nhau Cho 18,8g hỗn hợp X tác dụng với Na du, thu được

Giúp mik với mik đang cần gấp

xắp xếp onpvicer itorsvis sasdthou ko dyùng wed

Chứng minh rằng: 102021 + 872 chia hết cho 72.

a,2x(x-3)-3(x-3)=0 b,x²(x-1)+4(1-x)=0 c,2x(x-5)+(x-5)² d,(2x-1)=(4-3x)² e,2x(3-4X)-5x²(4x-3)=0

Viết một đoạn văn từ 5 đến 7 câu miêu tả Dế Mèn trong văn bản "Bài học đường đời đầu tiên".

Exercise 2: Give the correct form of the verbs in brackets. 1. Last week, that strong man __________________________ (accuse) of having attacked the old lady's puppy. 2. They congratulated their beloved mayor on _____________________________ (give) an excellent speech. 3. Their clients agreed to pay by check after __________________________________ (receive) the contracts. 4. He went out to play after ____________________________________ (ask) his mother's permission. 5. We went to bed after _________________________________________________ (switch) all the lights. 6. My friend's cousin apologized for ___________________________________ (break) my vase 4 months ago. 7. His neighbors suspected him of ____________________________ (dump) a lot of rubbish onto the beach. 8. The president was awarded for __________________ (promote) the close relationship between two countries. Exercise 3: Complete the following sentences. 1. He did not drive home himself after __________________________________________________________. 2. _______________________________________________________________, they had no desire to go there. 3. _________________________________________________, he was taken to hospital and had an operation. 4. She said good-bye to him after ______________________________________________________________. 5. Farmers turned to use bio-fertilizers after ______________________________________________________. 1. The government has pledged to clean up industrial _________________________________________ (emit) 2. Flu is highly __________________________________________________ (infect) 3. We risk upsetting the (ecology) ______________________________________________ balance of the area. 4. Strikes are causing severe ___________________________________ to all train services. (disrupt) 5. The mountain gorilla is on the verge of __________________________________________ (extinct) 6. Police are investigating the _________________________________________ of a young woman. (appear) 7. There is a need for greater __________________________________ and choice in education. (diverse) 8. Profits have increased ___________________________________ over the past few years. (signify) 9. State _____________________ have been arguing over the new healthcare reform bill for months. (lawmake) 10. It is said that land erosion is caused by widespread _______________________________________. (forest) Exercise 4: Rearrange the words/phrases to make meaningful sentences. 1. the / was / having / of / He / stolen / money. / accused __________________________________________________________________________________________ 2. wine. / She / up / of / suddenly, / glass / stood / upsetting / a __________________________________________________________________________________________ 3. trap. / he / right / walked / the / nothing, / Suspecting / into __________________________________________________________________________________________ 4. finished / Having/ his / he / to / all / bed. / homework, / went __________________________________________________________________________________________ 5. film / before, / Having / the / the / didn't seen / want / I / to / to / cinema. / go __________________________________________________________________________________________

Viết đoạn văn khoảng 200 chữ trình bày suy nghĩ của em về ý nghĩa của niềm tin vào bản thân

Exercise 2: Give the correct form of the verbs in brackets. 1. Last week, that strong man __________________________ (accuse) of having attacked the old lady's puppy. 2. They congratulated their beloved mayor on _____________________________ (give) an excellent speech. 3. Their clients agreed to pay by check after __________________________________ (receive) the contracts. 4. He went out to play after ____________________________________ (ask) his mother's permission. 5. We went to bed after _________________________________________________ (switch) all the lights. 6. My friend's cousin apologized for ___________________________________ (break) my vase 4 months ago. 7. His neighbors suspected him of ____________________________ (dump) a lot of rubbish onto the beach. 8. The president was awarded for __________________ (promote) the close relationship between two countries. Exercise 3: Complete the following sentences. 1. He did not drive home himself after __________________________________________________________. 2. _______________________________________________________________, they had no desire to go there. 3. _________________________________________________, he was taken to hospital and had an operation. 4. She said good-bye to him after ______________________________________________________________. 5. Farmers turned to use bio-fertilizers after ______________________________________________________. 1. The government has pledged to clean up industrial _________________________________________ (emit) 2. Flu is highly __________________________________________________ (infect) 3. We risk upsetting the (ecology) ______________________________________________ balance of the area. 4. Strikes are causing severe ___________________________________ to all train services. (disrupt) 5. The mountain gorilla is on the verge of __________________________________________ (extinct) 6. Police are investigating the _________________________________________ of a young woman. (appear) 7. There is a need for greater __________________________________ and choice in education. (diverse) 8. Profits have increased ___________________________________ over the past few years. (signify) 9. State _____________________ have been arguing over the new healthcare reform bill for months. (lawmake) 10. It is said that land erosion is caused by widespread _______________________________________. (forest) Exercise 4: Rearrange the words/phrases to make meaningful sentences. 1. the / was / having / of / He / stolen / money. / accused __________________________________________________________________________________________ 2. wine. / She / up / of / suddenly, / glass / stood / upsetting / a __________________________________________________________________________________________ 3. trap. / he / right / walked / the / nothing, / Suspecting / into __________________________________________________________________________________________ 4. finished / Having/ his / he / to / all / bed. / homework, / went __________________________________________________________________________________________ 5. film / before, / Having / the / the / didn't seen / want / I / to / to / cinema. / go __________________________________________________________________________________________

Thực hiện phép tính ( tính nhanh nêú có thể) a, 126 + (-20) + |-124| – (-320) b, (-17) + 5 + 8 + 17 + (-3) c, 38.77 + 24.38 – 38 d, 136.23 + 136.17 – 40.36 help me !