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Cho 100ml dung dịch H3PO4 có nồng độ mol 2M tác dụng với dung dịch KOH có nồng độ mol 4M thì thu được 2 muối X và Y ( với Mx < My ) có tỉ lệ số mol tương ứng là 2:3. Tính thể tích dung dịch KOH có nồng độ mol 4M đã phản ứng và xác định nồng độ mol mỗi muối có trong dung dịch thu được sau phản ứng.

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Xin chào, mình cần các bạn giúp đỡ :(( Chỉ cần ghi ý ngắn gọn Nêu mặt có lợi nếu: Tất cả các trường đại học(công lập) đều miễn học phí cho tất cả học sinh?

Caill :Vương Nhất Bác màu xanh lá cây, trang trí,tradi nha

help 24. Both of the computers …… not working. A. were B. is C. was D. has been 25. Learning foreign languages …… necessary at all time. A. are B. will be C. were D. is 26. Money, nor fame, nor wealth …… brought happiness to everybody. A. has B. have C. are D. were 27. Most of the rooms in the hotel where we are staying …… air conditioning. A. have B. had C. has had D. has 28. The bottles of wine …… on the shelf. A. is B. are C. was D. has put 29. I think the teacher as well as his students …… good. A. is B. are C. be D. to be 30. None of the students …… the vice principal. A. has seen B .have seen C. is seen D. was seen 31. There …… a lot of expensive furniture in our uncle’s house. A. have been B. are C. is D. were 32. Each of you …… responsible for this. A. are B. being C. is D. be 33. Bill together with his brothers …… to the beach every morning. A. going B. goes C. are D. gone 34. Either the monitor or the athletes …… to blame for the bad result. A. be B. are C. is D. to be 35. Everyone …… with me about my plans. A. agree B. agreeing C. disagree D. agrees 36. Tim as well as his relatives …… safe from the hurricane. A. be B. is C. are D. being 37. The little boy with his friends …… coming here. A. be B. is C. are D. to be 38. Neither Jane nor her classmates nor her boy friend …… the problem . A. understands B. understand C. not understand D. understand not 39. The results of Dr. Frank’s experiment …… announced on TV last night. A. is B. are C. was D. were 40. Fifty minutes …… the maximum length of time allowed for the exam. A. is B. be C. are D. were 41. Each of the teachers …… a timetable. A. to have B. have C. having D. has 42. The cost of living …… over 10% in the last few years. A. rises B. has risen C. rose D. is rising 43. Neither the teacher nor the students …… happy about the test results. A. are B. is C. has D. have 44. A number of sheep …… eating grass now. A. is B. are C. was D. were 45. Measles …… sometimes a serious disease. A. is B. are C. being D. be 46. The effects of cigarette smoking …… been proven to be extremely harmful. A. has B. have C. is D. are 47. The number of students who …… withdrawn from class this semester …… appalling. A. has/is B. have/are C. have/is D. has/are 48. The exercise on agreement of subjects and verbs …… easy. A. are B. have C. has D. is 49. Making cakes and pies …… Mrs. Reed’s specialty. A. are B. were C. is D. be 50. The United Nations …… about 160 nations. A. consist of B. consisting C. consist D. consists of

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