Có a gam bột sắt để ngoài kk, sau một thời gian biến thành hh B khối lượng 24g gồm Fe, FeO, Fe2O3, Fe3O4. Cho hh B tác dụng vừa đủ 300ml dd axit HNO3 thu được 4,48l khí duy nhất NO(đktc). a, Viết các PTHH. Tính a. b, Tính CM của dd HNO3 Giúp mình với hứa vote 5 sao!!!
Trộn CuO với một oxit kim loại M (hoá trị II) theo tỉ lệ số mol là 1:2 được dd A. Cho 1 luồng khí CO nóng (dư) đi qua 1,2 g hh A đến phản ứng hoàn toàn thu được chất rắn B. Để hoà tan hết chất rắn B cần 50ml dd HNO3 1M thu được dd C chỉ chứa muối của 2 kim loại và V lít khí NO duy nhất (đktc). Xác định M và tính V. Giúp mình với hứa vote 5 sao !!
Giải thích chi tiết Nhất có thể cho em cái này đi ạ ?( tại sao góc ở giữa( khoanh đỏ)bằng tổng hai góc hai bên (khoanh vÀng) dựa vào định lý toán học nào ?)
mọi người có biết học những luồng kiến thức nào để chắc chắn điểm anh được 9 trong đề đại học ko mọi người, giúp mình với đc ko
46. What kind of weather do you like? 47. What do you do when it rains? 48. How many seasons are there in your country? 49. Which season(s) do you like best? 50. What do you like most about your school? 51. How many hours a night do you sleep? 52. What do you do to have good health? 53. Have you ever won a competition? 54. Do you play computer games? 55. Which computer games do you like best? 56. What kind of books do you like to read? 57. How often do you do exercise? 58. Tell me something about your best friend. 59. Do you live in a flat or in a house? 60. What does it look like? How many rooms are there? 61. Do you help your mother with the housework? What do you do to help? 62. What do you use computer / internet for? 63. Do you have a computer at home? 64. How many hours a week do you spend on a computer? 65. What are your favourite websites? 66. Do you collect anything? What do you collect? 67. How many have you collected? 68. Where do you keep them? 69. When did you start / begin your collection? 70. What’s your aim? (mục đích) 71. What do you usually have for breakfast / lunch / dinner? 72. Is your diet healthy? 73. What are you going to do when you leave school? 74. When are you going to leave school? 75. Are you going to study at university? 76. What are you going to study? 77. What do you want to be? 78. Do you have any plans for the future? 79. What type of house are you going to live in? 80. Are you going to live in another country? Where / Why? 81. What type of books / films / TV programmes / music do you like best? 82. How often do you go to the cinema? 83. How many hours do you watch TV everyday? 84. What is your favourite program? When is it on? 85. Do you watch sports on TV? 86. Where do you usually listen to music? 87. Who is your favorite singer? 88. Do you often buy CDs? 89. Do you download music from the Internet? 90. How much pocket money do you get every week?
Giúp mình làm đề này với ạ ! Đang cần gấp để nộp ! Cảm ơn ạ
Em hiểu gì về bản chất của tên quan phụ mẫu trong bài sống chết mặc bay? Viết thành đoạn văn khoảng 10 câu
bạn nào vẽ được hình này trên scratch cho mình xin code tham khảo với ạ. Thanks! Biết đường kính hình tròn lớn là 304, bán kính hình tròn nhỏ là 130, lá có bán kính 60, đường kính hoa là 40
tìm chu kỳ T của hàm số y= tan( 3πx + 2020)
Làm hết chỗ này hộ mình trong hôm nay nhé. 33. What kind of music do you listen to? 34. What other languages would you like to learn? 35. What’s your favorite food/clothes/film? 36. How often do you go shopping? 37. When do you listen to CDs? 38. What computer games do you play? 39. Do you have to wear uniform when going to school? 40. Can you play tennis? / badminton / volleyball ...? 41. Which sport do you enjoy playing / watching? 42. Do you do anything to keep fit? 43. Are you the oldest or youngest? 44. Do you like living in a small or big family? Why / Why not? 45. What’s your bedroom look like? 46. What kind of weather do you like? 47. What do you do when it rains? 48. How many seasons are there in your country? 49. Which season(s) do you like best? 50. What do you like most about your school? 51. How many hours a night do you sleep? 52. What do you do to have good health? 53. Have you ever won a competition? 54. Do you play computer games? 55. Which computer games do you like best? 56. What kind of books do you like to read? 57. How often do you do exercise? 58. Tell me something about your best friend. 59. Do you live in a flat or in a house? 60. What does it look like? How many rooms are there? 61. Do you help your mother with the housework? What do you do to help? 62. What do you use computer / internet for? 63. Do you have a computer at home? 64. How many hours a week do you spend on a computer? 65. What are your favourite websites? 66. Do you collect anything? What do you collect? 67. How many have you collected? 68. Where do you keep them? 69. When did you start / begin your collection? 70. What’s your aim? (mục đích) 71. What do you usually have for breakfast / lunch / dinner? 72. Is your diet healthy? 73. What are you going to do when you leave school? 74. When are you going to leave school? 75. Are you going to study at university? 76. What are you going to study? 77. What do you want to be? 78. Do you have any plans for the future? 79. What type of house are you going to live in? 80. Are you going to live in another country? Where / Why? 81. What type of books / films / TV programmes / music do you like best? 82. How often do you go to the cinema? 83. How many hours do you watch TV everyday? 84. What is your favourite program? When is it on? 85. Do you watch sports on TV? 86. Where do you usually listen to music? 87. Who is your favorite singer? 88. Do you often buy CDs? 89. Do you download music from the Internet? 90. How much pocket money do you get every week?
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