user-avatar
lephuocnghia2511
2 năm trước
Trong phòng thí nghiệm có lọ đựng 150ml dung dịch HCl 10% có D = 1,047 g/ml và lọ khác đựng 250ml dung dịch HCl 2M. Trộn 2 dung dịch này với nhau ta được dung dịch HCl (dung dịch A). Biết 40ml dung dịch A tác dụng vừa đủ với 2,7g hỗn hợp 2 kim loại Zn và Fe. a) Tính nồng độ mol của dung dịch A. b) Xác định thành phần phần trăm theo khối lượng mỗi kim loại trong hỗn hợp
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I. Choose the best answer in brackets to complete each of the following sentences. 1. Yesterday I met some people_________ (who/ whose) car broke down. 2. What’s the name of the girl________ (who/ whose) is singing on the stage? 3. We went to Hoan Kiem to see firework___ (despite/ though) the fact that it’s very cold. 4. I sent a card to congratulate Hoa (for/ on) winning the first prize in the contest. 5. Minh _________(washed/ was washing ) the dishes while her sister ________(made/ was making) the cake. 6. All the things______ (who/ which) we bought are for the party on the New Year’s Eve. 7. _________ (In spite of/ Even though) I had an umbrella, I got very wet in the rain. II. Combine each pair of sentences into one by using a suitable Relative Pronouns. 1. Have you ever spoken to the people? They live next door. …………………………………………………………………………………………… 2. It’s a book. It will interest children of all ages. …………………………………………………………………………………………… 3. The people keep having all night parties. They live next door. …………………………………………………………………………………………… 4. These are the keys. They open the front door and back door. …………………………………………………………………………………………… 5. Here’s an article. It might interest you. …………………………………………………………………………………………… 6. Where are the eggs? They are in the fridge. …………………………………………………………………………………………… 7. Have you got something? It will get ink out of the carpet. …………………………………………………………………………………………… 8. Where’s the girl? She sells the tickets. …………………………………………………………………………………………… 9. Half of the people didn’t appear. They were invited. …………………………………………………………………………………………… 10. The festival is called Easter. It is in the late March or early April. …………………………………………………………………………………………… III. Combine each pair of sentences into one by using a suitable Relative Pronouns. 1. Have you ever spoken to the people? They live next door. …………………………………………………………………………………………… 2. It’s a book. It will interest children of all ages. …………………………………………………………………………………………… 3. The people keep having all night parties. They live next door. …………………………………………………………………………………………… 4. These are the keys. They open the front door and back door. …………………………………………………………………………………………… 5. Here’s an article. It might interest you. …………………………………………………………………………………………… 6. Where are the eggs? They are in the fridge. …………………………………………………………………………………………… 7. Have you got something? It will get ink out of the carpet. …………………………………………………………………………………………… 8. Where’s the girl? She sells the tickets. …………………………………………………………………………………………… 9. Half of the people didn’t appear. They were invited. …………………………………………………………………………………………… 10. The festival is called Easter. It is in the late March or early April. …………………………………………………………………………………………… IV. Use “ALTHOUGH”, “ THOUGH” or “ EVEN THOUGH” to combine each pair of these sentences. 1. He often tells lies. Many people believe him. …………………………………………………………………………………………… 2. She didn’t eat much. She was hungry. …………………………………………………………………………………………… 3. He is over 60. He doesn’t wear glasses. …………………………………………………………………………………………… 4. It got dark. They continued to work. …………………………………………………………………………………………… 5. She kept on studying. It was noisy. …………………………………………………………………………………………… 6. He ate all the fruits. They were green. …………………………………………………………………………………………… 7. We could do the test. It was very difficult. …………………………………………………………………………………………… 8. He is very strong. I’m not afraid of him. …………………………………………………………………………………………… 9. The plane took off. The weather was bad. …………………………………………………………………………………………… 10. He didn’t stop his car. The traffic lights turned red. …………………………………………………………………………………………… 11. They went on a picnic. The weather was very bad. …………………………………………………………………………………………… V. Combine each pair of sentences into one by using a suitable Relative Pronouns. 1. Have you ever spoken to the people? They live next door. …………………………………………………………………………………………… 2. It’s a book. It will interest children of all ages. …………………………………………………………………………………………… 3. The people keep having all night parties. They live next door. …………………………………………………………………………………………… 4. These are the keys. They open the front door and back door. …………………………………………………………………………………………… 5. Here’s an article. It might interest you. …………………………………………………………………………………………… 6. Where are the eggs? They are in the fridge. …………………………………………………………………………………………… 7. Have you got something? It will get ink out of the carpet. …………………………………………………………………………………………… 8. Where’s the girl? She sells the tickets. …………………………………………………………………………………………… 9. Half of the people didn’t appear. They were invited. …………………………………………………………………………………………… 10. The festival is called Easter. It is in the late March or early April. …………………………………………………………

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team