Hòa tan 28 g kim loại Fe và dung dịch axit clohiđric 10% Tính nồng độ phần trăm dung dịch muối zncl2 sau đó phản ứng cho Fe = 56 độ c l = 35,5 h = 1 S = 32 ai O = 6

Các câu hỏi liên quan

Mark the letter A, B, C or D to indicate the correct answer to each of the following question. 8. In 1990, due to the change of the economic situation, Dong Ho paintings were difficult to sell and many__________ quit their job. A. craftsmanship B. craft unions C. craftsmen D. crafts 9. Making rice paper__________ jobs and income for many locals, and helps many families out of poverty and become well-off. A. keeps B. gets C. applies for D. creates 10. Since changing the way of production, many craftsmen have voluntarily joined together to form__________. A. cooperates B. cooperation C. cooperatives D. cooperative 11. The artisan is delighted to__________ to you the craft of creating prints in an old-age style. A. demonstrate B. explain C. express D. provide 12. We have plenty of time for doing the work. We__________ be hurried. A. needn't B. shouldn't C. mustn't D. mayn't 13. It gets__________ to understand what the professor has explained. A. the more difficult B. more difficult than C. difficult more and more D. more and more difficult 14. Nowadays, Tan Chau artisans can produce silk of multiple colours__________ they can meet customers' demands. A. so B. so that C. but D. in order 15. How are you on with your work? - It is OK A. calling B. getting C. playing D. looking 16. When we arrived at the meeting, the first speaker__________ and the audience A. had just finished / were clapping B. had just finished / clapped C. was finishing / clapped D. finished / had clapped Mark the letter A, B, C or D to indicate the correct response to each of the following exchanges. 17. "Why don't we visit the Happy Mind Charity Centre this weekend?" - “__________” A. Because it is so useful. B. That's a good idea I C. I'll tell you about this centre. D. Until next time. 18. "Hello. I'm Minh, the leader of Dream Sky volunteer team" - “__________” A. Nice to meet you. I'm John, from Volunteer Bolivia. B. It's nice of you so say so. I'm John, from Volunteer Bolivia. C. Fine, see you again soon, Minh. D. Don't mention it. I'm John, from Volunteer Bolivia.