user-avatar
Trang15
2 năm trước
Hòa tan hoàn toàn 13,8g hh gồm Mg và một kim loại hóa trị II bằng đ H2SO4 loãng thu được 26,88l khí (đktc). Kim loại hóa trị II và % khối lượng của nó trong hh là ? A.Be; 65,3% B.Ca; 51% C.Zn;67,2% D.Fe;49,72%
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Mọi người giúp em với, em cần gấp lắm ạ II. Rewrite the following sentences without changing the meaning, using the word given 1. Although he is wealthy, he is not spoiled. (despite) ____________________________________________________________________ 2. The view of the mountains is very exciting and impressive. (breathtaking) The view____________________________________________________________ 3. She told me the secret, despite having promised not to do so. (although) ____________________________________________________________________ 4. If you had a wider range of vocabulary, you could write better. (could) Your ____________________ better if you had a wider range of vocabulary. 5. He asked: “How should I deal with school pressure?” (to) He asked me how____________________________________________________ 6. It was 1998.1 met her for the first time. (when) ____________________________________________________________________ 7. He asked me: “What should I do?” (wondered) He_________________________________________________________________ 8. The last time I travelled to Hong Kong was two years ago. (for) I haven’t _____________________________ two years. 9. My parents insist that I study hard. (want) ____________________________________________________________________ 10. The souvenirs here are not expensive. (affordable) The prices of the souvenirs______________________________________________ 11. He asked: “Could you tell me what social skills I should have?” (should) He asked___________________________________________________________ 12. My friend ate a chocolate cake even though she was on a diet. (in spite of) ____________________________________________________________________ 13. Despite a good salary, he was unhappy in his job. (although) ____________________________________________________________________ 14. He said: “Why don’t you call the helpline? They can give you good advice”. (because) He advised me ___________________________ they could give me good advice. 15. In spite of their poverty, they are very generous, (though) ____________________________________________________________________ 16. Though he has been absent frequently, he has managed to pass the test. (in spite of) ____________________________________________________________________ 17. We don’t have to spend too much money to stay at this hotel. (bank) Staying at this hotel___________________________________________________ 18. I have never visited such a historic temple. (historic) This is ________________________________ temple I have ever visited 19. I heard that you had got a new job. I was pleased. (to) I was ___________________________ that you had got a new job. 20. I am stuck in a traffic jam; I want to be somewhere else. (were) I wish I _______________________ in this traffic jam. 21. His passing the exam made me feel much relieved. (that) I was __________________________ he passed the exam 22. Students will be given more opportunities to practise their knowledge. They are active participants. (who) ____________________________________________________________________ 23. My uncle is a fire fighter. He visited us last weekend. (who) ____________________________________________________________________ 24. The storm started at 2 o’clock this morning. It caused a lot of damage. (which) ____________________________________________________________________ 25. It is a camping shop. It has a lot of good equipment. (which) ____________________________________________________________________ 26. A great number of people speak English as a foreign language. Their native language is not English. (whose) ____________________________________________________________________ 27. I have a friend. Her mum is a volunteer worker. (whose) ____________________________________________________________________ 28. The rescue operation was arranged by a charity organisation. It was a success. (which) ____________________________________________________________________ 29. 2015 is the year. My sister became a nurse. (when) ____________________________________________________________________ 30. The Red River Delta is the granary in northern Vietnam. It is formed by the Red River. (which) ____________________________________________________________________

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