Hòa tan hoàn toàn 2,97 gam hỗn hợp 2 muối cacbonat bằng dung dịch H2SO4 dư thu được dung dịch X và 0,56 lít khí bay ra (đktc) khối lượng muối có trong dung dịch X là:

II. For questions 11- 19, read the text below and think of the word which best fits each gap. Use only one word in each gap. RUNNING A MARATHON So you want to run a marathon? There is (11) ........................................... doubt that running 42 kilometers is a great achievement. Many training plans involve running four times a week for at (12) ........................................... three months, and sometimes longer. Experts strongly recommend that you should (13) ........................................... used to running long distances gradually. If you don’t, it can increase the chances (14) ........................................... picking up an injury. It (15) ........................................... generally thought that runners should initially go on fairly relaxed training runs. The pace should be gentle enough to allow you (16) ........................................... have a conversation with someone running alongside you. Don’t make the mistake of eating too little before the race, or you will rapidly run (17) ........................................... of energy. But (18) ........................................... should you eat a large meal. It goes without saying that choosing the right footwear is also essential. (19) ........................................... you do, avoid clothes made of cotton and go for artificial materials, or even some types of wool such as merino. Choose clothing that will be comfortable.

X là hỗn hợp 2 kim loại: Mg và Fe. Để hòa tan vừa đủ 21,6 gam hỗn hợp X cần dùng 98 gam HCl. Tính khối lượng của Fe trong hỗn hợp X

Câu trả lời thì mik bít rồi mik cần giải thích chính xác nhất

B PRACTICE Exercise 1: Complete the sentences using the given words. 1. Tourists can see a wide .................... of hand-made things at the event. A. lot B. variety C. many 2. He was hired for the position because he is .................... A. reliability B. reliably C. reliable 3. There are many stores in the .................... area of the city. A. downtown B. suburb C. mountain 4. Most big companies are built and developed in .................... areas. A. urban B. rural C. mountainous 5. He wants to buy an .................... car because he doesn’t have much money. A. expensive B. affordable C. rich 6. The research on tourism was .................... by scientists at the most famous national university. A. conduction B. conductive C. conducted 7. New Zealand is one of the countries of .................... A. Oceania B. Asian C. Asian and Pacific 8. Economic .................... this year are better than those of last year. A. indicator B. indicators C. indicative Exercise 2: Complete the sentences using the given words. overcrowding packed shelter extended atmosphere 1. Many people prefer to live in the countryside rather than in big cities because of its peaceful .................... 2. Refugees and homeless people in the city need to be donated food to eat and a .................... to sleep. 3. The roads are .................... as one of the solutions to deal with traffic jams. 4. .................... in the neighborhood is one of the causes of social evils. 5. We decided to move to another restaurant because the other restaurant was .................... Exercise 3: Choose the best option to complete the sentence. 1. Of the four dresses, I like the red one .................... (better/ the best). 2. Pat’s car is (faster/ fastest) .................... than Dan’s. 3. John is (less/ the least) .................... energetic of all the men. 4. Does Fred feel (weller/ better) .................... today than he did yesterday? 5. My cat is the (prettier/ prettiest) .................... of the two. 6. This vegetable soup tastes very (good/ best) .................... 7. David is the (happier/ happiest) .................... person that we know. 8. This summery is (the better/ the best) .................... of the pair. 9. Jim has as (few/ fewer) .................... opportunities to play tennis as I do. 10. The museum is (the farther/ the farthest) .................... away of the three buildings.

Giúp mình với ạ!!!! Hứa vote 5 sao ạ

Cho ABC vuông tại A có AH là đường cao. Trên cạnh AC lấy điểm S, vẽ AT⏊BS tại T. a) Chứng minh: BHT ഗ BSC và BCT ഗ BSH. ̂̂ b) Chứng minh: 𝑇𝐻𝑆 = 𝑇𝐶𝑆.

Giải phương trình nghiệm nguyên d) $x^{2}$ + x - $y^{2}$ - 9 = 0 e ) $x^{2}$ -$y^{2}$ = 91 f )$x^{2}$ + xy - y = 2 g) $2x^{2}$ + xy + 3y = 3 h) $\frac{3}{x}$ + $\frac{3}{y}$ = 5

Cần giúp gấp thank mọi người nha

Viết câu lệnh lặp: FD 10 RT 90 FD 10 RT 90 FD 10 RT 90 FD 10 RT 90 FD 10 RT 90