user-avatar
thuycua0511
2 năm trước
Đốt cháy 6,2 gam phốt pho trong oxi dư, sau phản ứng hòa tan sản phẩm vào nước được 500ml dung dịch A (d = 1,05 g/ml). a. Tính nồng độ mol của dung dịch A? b. Cho 20 gam MgO vào dung dịch A đến khi phản ứng xảy ra hoàn toàn. Tính nồng độ phần trăm các chất có trong dung dịch sau phản ứng?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I. Choose the word whose underlined part is pronounced differently from the others. 1. A. passed B. watched C. collected D. worked 2. A. opens B. photographs C. performs D. pays 3. A. wealth B. head C. bread D. steal 4. A. reason B. busy C. son D. easy 5. A. paper B. happy C. passage D. handbag II. Choose the best answer (A, B, C or D) to complete the following sentences. 6. Would you mind _____ me to take these chairs away? A. to help B. help C. helped D. helping 7. The police officer stopped and asked us where_____. A. we are going B. were we going C. we were going D. are we going 8. There is a _____ between the North and the South. A. differently B. difference C. differ D. different 9. She is a foreigner, _____she needs a visa to stay in this hotel. A. for B. but C. so D. so that 10. That man is the person__________ we met yesterday at the party. A. when B. whom C. which D. who 11. My children are very ___________ about going to the zoo. A. excited B. interesting C. interested D. exciting 12. Susan rarely stays up late, _____? A .is she B. isn’t she C. does she D .doesn’t she 13. Are you looking for my brother? - He isn't at home now. He ________ to the cinema. A. goes B. went C. has gone D. is going 14. He has failed so many times, but he won’t ……………… A. give away B. give out C. give up D. give back 15. “How about having a drive to the countryside this weekend?” - “____________” A. Not at all B. You are welcome C. No, thanks D. That’s a good idea.

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