user-avatar
nguyenngoc270908
2 năm trước
Câu 3 (2,0 đ): Hãy gọi tên và phân loại các chất có công thức hóa học sau: FeCl3 , Mg(OH)2 , Ag2O, H2SO4. Câu 4 (2,0 đ): a/ Trong 200 ml dung dịch có hòa tan 16 gam CuSO4. Hãy tính nồng độ mol của dung dịch CuSO4? b/ Hãy tính số mol H2SO4 có trong 150 gam dung dịch H2SO4 có nồng độ 9,8 %. Câu 5: (2,0 đ) Cho 13 gam Zn tác dụng vừa đủ với 182,5 gam dung dịch HCl. a/ Viết phương trình hóa học của phản ứng trên. b/ Tính khối lượng ZnCl2 tạo thành sau phản ứng. c/ Tính nồng độ phần trăm của dung dịch HCl đã dùng. Cho H = 1; O = 16; S = 32; Cl = 35,5; Fe = 56; Cu = 64; Zn = 65
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

32. She was brought up in a (well-off) family. She can’t understand the problems we are facing. A. poor B. broke C. wealthy D. kind 33. (At times), I look at him and wonder what is going on his mind. A. Never B. Always C. Hardly D. Sometimes 34. We hope to become more (accurate) in predicting earthquakes. A. dangerous B. delicious C. nervous D. exact 35. We should buy a new house at (affordable) price. A. reasonable B. cheap C. low D. good 36. There was a (respectful) minute silence as we remembered the victims of virus covid-19. A. reflexive B. memory C. worshipful D. well-mannered 37. We have to cross a (crowded) street to get to school everyday. A. large B. busy C. small D. narrow 38. Humans will enjoy longer life expectancy when they are more (conscious of)  what they eat and do. A. aware of B. capable of C. responsible for D. suitable for 39. Those who don't have computer skills are really (behind the times). A. out of work B. out of fashion C. out of date D. out of question 40. Fruits and vegetables on the island are (abundant), which enables the islanders to make a fortune. A. plentiful B. different C. effective D. economical 41. Father has lost his job, so we’ll have to (tighten our belt) to avoid getting into debt. A. earn money B. spend money C. sit still D. economize 42. Sorry, I’m late. A problem (came up) with the keys. A. rose B. happened C. appeared D. became available 43. It will be fine tomorrow. But if it should rain tomorrow, the match will be (postponed). A. turned off B. put off C. sold off D. taken off 44. Laws on military service since 1960 still (hold good). A. is in good condition B. remains for good C. stands in life D. remains in effect 45. He was asked to (account for) his presence at the scene of crime. A. complain B. exchange C. explain D. arrange 46. Water pollution is a result of dumping (pollutants) such as detergents, pesticides, oil, and other chemicals in rivers, which makes the water unclean. A. substances B. stuffs C. contaminants D. wastes 47. Roget's Thesaurus, a collection of English words and phrases, was originally arranged by the ideas they express (rather than) by alphabetical order. A. restricted B. as well as C. unless D. instead of 48. Let's wait here for her; I'm sure she'll (turn up) soon. A. return B. arrive C. enter D. visit 49. I could see the finish line and thought I was (home and dry). A. hopeless B. hopeful C. successful D. unsuccessful 50. (Carpets) from countries such as Persia and Afghanistan often fetch high prices in the United States. A. Artifacts B. Pottery C. Rugs D. Textiles 51. Sue and Daisy are as different as chalk and cheese. No wonder their friendship has (broken up) recently. A. changed B. ended C. improved D. appeared 52. He was (astounded) at his bad luck. He couldn't believe it. A. unhappy B. frightened C. astonished D. amused 53. Your house is always so (neat). How do you manage it? A. dirty B. messy C. tidy D. organised 54. The two necklaces were very (alike). A. similar B. equal C. double D. uniform

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