為什麼[A(org)]=n[An(org)]成立 (第三張圖equation 7.9) 感謝

Experiment 7 Experiment 7 The partition of Organic acid between Water and Organic solvent Objectives Understand the partition of a solute between two immiscible solvents. Introduction A chemical analysis that is performed primarily with the aid of volumetric glassware (e.g., pipets, burets, volumetric flasks) is called a volumetric analysis. For a volumetric analysis procedure, a known quantity or a carefully measured amount of one substance reacts with a to-be-determined amount of another substance with the reaction occurring in aqueous solution. The volumes of all solutions are carefully measured with volumetric glassware. The known amount of the substance for an analysis is generally measured and available in two ways: 1. As a primary standard: An accurate mass (and thus, moles) of a solid substance is measured on a balance, dissolved in water, and then reacted with the substance being analyzed. 2. As a standard solution: A measured number of moles of substance is present in a measured volume of solution - a solution of known concentration, generally expressed as the molar concentration (or molarity) of the substance. A measured volume of the standard solution then reacts with the substance being analyzed. The reaction of the known substance with the substance to be analyzed, occurring in aqueous solution, is generally conducted by a titration procedure. The titration procedure required a buret to dispense a liquid, called the titrant, into a flask containing the analyte. A reaction is complete when stoichiometric amounts of the reacting substances are combined. In a titration this is the stoichiometric point. In this experiment the stoichiometric point for the acid-base titration is detected using a phenolphthalein indicator. Phenolphthalein is colorless in an acidic solution but pink in a basic solution. The point in the titration at which the phenolphthalein changes color is called the endpoint of the indicator. Indicators are selected so that the stoichiometric point in the titration coincides (at approximately the same pH) with the endpoint of the indicator.

想問這題怎麼算

28. A trough is 6 m long and its ends have the shape of isos- celes triangles that are 1 m across at the top and have a height of 50 cm. If the trough is being filled with water at a rate of 1.2 m³/min, how fast is the water level rising when the water is 30 centimeters deep? goal: dh dt

想請問這題的醚和胺的沸點可以如何排序？ 因為我印象中氫鍵的影響比極性大，因此不了解為什麼胺的沸點比醚小 謝謝🙏

56. List the following compounds from highest boiling to lowest boiling: NH₂ 分子量 - * b₁p= HB dipole 為何 ↓ relatively weak HB OH ⑥ dipole-dipole interactions Q= LOH has two groups that hydrop bund ~HNY WH HB的影響力不是通常大於極性嗎? OH Obme electronegative thun N, OH Ingen bond are stomper than NH₂ primary amines form stronger hydrogen bond than seculary relatively weak no bydrogen had hydrogen bonds HB→分子量(分散戶 nly dipic dipole →接觸面積→極性 hah no hydrogen bon weaker dipole-dipole interactions tha oxygen-containing compounds because N is low electro negative than O

以下節錄自《費曼物理學講義》： If we were to charge a body, say a comb, electrically, and then place a charged piece of paper at a distance and move th... 繼續閱讀

哪一個段落沒有主題句？ 我覺得是第一個，對嗎？ 要怎麼替這個段落寫出主題句呢？

2 Despite different home cultures and countries, international students' main overall motivation is the desire get out on their own, to carve out a new direction in their lives. "Foreign students" do not casually abandon the comforts of family and cultural ties; they have done their homework on Canadian schools. All their preparation, though, cannot prepare them for the loneliness and ongoing difficul- ties they face, from cold winters to financial issues related to the higher tuition fees they must pay. Some students, though, emigrate to escape those same tight- knit families and bonds that others find so painful to leave behind. A Macleans "On Campus" report notes that family expectations may be opposed to students' visions for themselves and lead them to reject accepted values and career paths in their hometowns and countries. Csilla, a web-design student at Waterloo admits, "I was always supposed to enter my family's restaurant business in Budapest, but I felt suf- focated even working part-time as a server. Web design is my passion, and I wanted 12: CAUSE OR EFFECT [- a completely fresh start, something that is completely my own ("International Stu- dents"). Finding independent paths to their own dreams is the key here, whether students choose those paths as a result of personal ideals or as a reaction to pre-set future plans.

請問42題為什麼是A(B、C不行嗎🥲

C40. D D (40-43) king 40 Long time ago, on Pig Land, there was a king pig, who ruled hundreds of sheep. The and he could make the sheep do anything he wanted them to do at any time. For example, he made them clean his big castle, take care of his farms, and cook for his family and relatives and his soldiers every day. Sometimes he ordered them to make clothes in the middle of the night. Although the sheep worked very hard for the king, 41 Their houses were small and dirty. What's more, he gave them little to eat. Most of the sheep were thin and weak because they were hungry all the time. Since they had to work from day to night, they were all tired out and unhappy. One day, the king thought to himself. "I'm the king, but I can't make the sheep like me. They never smile in front of me. 42 they stay as far from me as possible. I must try my best to win their heart." The next day, the king had a very old sheep come to him. He said to the sheep, "They say you're the wisest sheep on my land. I don't know why no sheep likes me. What should I do?" The old sheep answered, "My dearest king, it's easy. you do it, they'll be more friendly to you." 43 If From then on, the king did not have the sheep work more than eight hours a day or late at night. He gave them bigger houses and better food. Little by little, the sheep began to love the king pig from the bottom of their heart. The king's land became one of the happiest countries in the world. (A) was kind (B) was very brave (C) had great power (D) knew the art of loving 41. (A) they thanked him deeply (B) they fought for better lives (C) the king lived a terrible life (D) the king did not treat them well 42. (A) In fact (B) Even so (C) However (D) At first 43. (A) Not all sheep are the same (B) Keep your eye on the sheep (C) Give the sheep a lesson, and they'll learn (D) Treat the sheep the way you'd like to be treated 1111 15 英語閱讀

請問這些答案是什麼？

My Birthday Party Last weekend, I had a birthday party at my house. It__60 a lot of fun. I invited my friends, classmates, and relatives. We played games, ate cake, and opened gifts. The games 61 exciting and funny. We played musical chairs, pin the tail on the donkey, and charades. We laughed a lot and had a good time. The cake 62 delicious and beautiful. It was chocolate with vanilla frosting and sprinkles. It had candles that spelled my name. We sang happy birthday and I made a wish. The gifts 63 awesome and generous. I received many things, such as books, clothes, toys, and money. I thanked everyone for coming and for their gifts. I 64___ very happy, and everyone 65 happy, too. My birthday party was the best party ever. I enjoyed every moment of it. I felt loved and special. I will always remember it. 60. (A) be 61. (A) be 62. (A) be 63. (A) be 64. (A) be 65. (A) be (B) am (B) am (B) am (B) am (B) am (B) am (C) are (C) are (C) are (C) are (C) are (C) are (D) is (D) is (D) is (D) is (D) is (D) is (AB) was (AB) was (AB) was (AB) was (AB) was (AB) was (CD) were (CD) were (CD) were (CD) were (CD) were (CD) were

請問Mass光譜切割到最後 剩下的基團怎麼寫？ 切下乙烯、C=O後 剩下的基團要怎麼標示？ 分子量剩下55，是C3H5N 這是什麼基團或是結構嗎？

Relative Intensity 100 80 40 MS2008-03710CW 0 mm 83 20間距相差55m/Hz,可知可能為 111m/z出現訊號,可推 測分子量可能為111 111 間距相差28m/Hz,可知可能為-CH=CH(乙烯基) 55間距相差28m/Hz,可知可能為C-0 50 v/tbn/pyntyy.................... 100 150 m/z 200 250 28 28 55 NH2

想知道答案D的更詳細解釋🙏

75. 11 (Nej 25 Na²O² is less stable than [Na₂ ] 0². This lesser stability is due to (A)the very small size of the Na²+ ion (B)the large size of the O²- ion relative to Na²+ (C) the instability of oxide ions in the presence of 2+ ions W (D)more energy is required to ionize sodium than would be realized in the attraction between Na²+ and 0²- (Ethe statement is false, both materials are stable. 【87 成大】

微積分 求救

1. Complete the proof of the following question that we discussed in class: Let f: (a, b) → R be a bounded function. Suppose that for all x₁, x2 = (a, b), (f(x₁) + f(x2)) (x₁+x²) ≤ X2 2 Show that f is continuous on (a, b). 2. Let f [0, 1] → R be defined by if x € Qºn [0, 1] if x Qn [0, 1] and x = E f(x) = 0. where p, q are relative prime positive integers q' Prove that f is continuous at each irrational number in [0, 1].