cân bằng phương trình bằng cách oxi hóa khử FeS + H2SO4 --> Fe2(SO4)3 + S + SO2 + H2O Cu2S + HNO3 ---> NO + Cu(NO3)2 + CuSO4 + H2O FeS + HNO3 ---> Fe(NO3)3 + Fe2(SO4)3 + NO + H2O

Các câu hỏi liên quan

Viết lại các câu sau từ trực tiếp sang gián tiếp: 31. “You stole my best cassette, Amanda!” said John. -John accused________________________________________________ 32. “ You damaged my bicycle, John!” said Mary. -Mary accused________________________________________________ 33. “When was your little boy born?” said the nurse to Mrs. Bingley. -The nurse asked Mrs. Bingley________________________________________________ 34. “You should take more exercise, Mr. Robert,” the doctor said. -The doctor advised________________________________________________ 35. “Will I find a job?”, Tim said to himself. -Tim wondered________________________________________________ 36. “I’m sorry I gave you the wrong number,” said Paul to Susan. -Paul apologized________________________________________________ 37. “When is the first day of your holiday, Peter?” Martha asked. - Martha asked Peter when__________________________________________ 38. “Can I have a new bicycle?” said Anna to her mother. -Anna asked________________________________________________ 39. “Don’t leave the house until I get back, William”, his mother said. - William’s mother told________________________________________________ 40. “Don’t bite your nails,” said Mrs. Rogers to her son. -Mrs. Rogers told________________________________________________ 41. “I’ve seen the film three times, Mary” said George. -George said________________________________________________ 42. “I’m sorry, Angela,” said Martin, “I’m afraid I’ve damaged your car. -Martin apologized________________________________________________ 43. “Have you had enough for lunch?” the landlady asked us. -The landlady asked________________________________________________ 44. “John, please don’t tell anyone my new address,” said Mary. -Mary asked________________________________________________ 45. “Breakfast will not be served after 9. 30” said the notice. -The notice said that________________________________________________ 46. “Where is the best place to buy souvenirs?” -I asked________________________________________________ 47. “Don’t forget to bring your passport with you tomorrow” - She reminded me ________________________________________________ 48. “Do not write on the wall,” said the teacher to the boys. -The teacher told the boys___________________________________________ 49. “How many jobs have you had since 2000?” the interviewer asked Mr. Simpson. - The interviewer asked____________________________________________ 50. “Why didn’t you report the incident to the police?” the officer asked the frightened witness. - The officer wanted to know_________________________________________