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.

求英文橘子復習講義第三冊解答🙇🏻‍♀️

4 元 6 第三冊(I) 貼心提供置端學院線上 文法重點 重要度 每天氣的問與答 ★★ ① 所有 授與動詞的用法 • 從屬連接詞:when, before, after 6 電話 主題 1 單字好好記 ●國家名稱 社團 18. Taiwa ect 科目;主題:主詞 19. the Rd 數學 (sarons] 自然;科學 中文;中國人 歷史 make history(創造歷史) = physical education) 俱樂部;棍棒 20. the US of Ame 21. America American 22 Japan 日 Japanese (B ● 其他 媽 參加活動的媽媽 23. end

求大神幫我改作文🙏🏻🙏🏻

歷屆試題 提示:請以“Music Is An Important Part of Our Life”為題,說明音樂(例如古典音樂、流 culte alt 行歌曲、搖滾音樂等)在生活中的重要性,並以你或他人的經驗為例,敘述音樂所帶來的好處。 【92 年學測作文題】

讀完這篇文章這六題題目可以怎麼回答？（急） 1. Summarize and write a theme for the poem. 2. Give an example of a simile, metaphor, and personification in the... 繼續閱讀

"Ex-Basketball Player" by John Updike Pearl Avenue runs past the high-school lot, Bends with the trolley tracks, and stops, cut off Before it has a chance to go two blocks, At Colonel McComsky Plaza. Berth's Garage Is on the corner facing west, and there, Most days, you'll find Flick Webb, who helps Berth out. Flick stands tall among the idiot pumps- Five on a side, the old bubble-head style, Their rubber elbows hanging loose and low. One's nostrils are two S's, and his eyes An E and O. And one is squat, without A head at all-more of a football type. Once Flick played for the high-school team, the Wizards. He was good: in fact, the best. In '46 He bucketed three hundred ninety points, A county record still. The ball loved Flick. I saw him rack up thirty-eight or forty In one home game. His hands were like wild birds. He never learned a trade, he just sells gas, Checks oil, and changes flats. Once in a while, As a gag, he dribbles an inner tube, But most of us remember anyway.

請問第16、17要怎麼作答

It's widely known that bees are important for our ecosystem and that they are facing increasing threats from modern agricultural practices involving pesticides. What many of us don't know, 16. (is that some industries should shoulder a bigger share of blame than they're given.) The almond industry, for instance, has quite an adverse impact on bee colonies. One potential harm to bee colonies is the stress caused by transporting them over long distances to almond orchards for the task of pollination. This transportation can be stressful for the bees, hence 17. them more vulnerable to diseases and pests. Moreover, since they're 18. having limited food sources aside from almond flowers further weakens bee colonies. Still another problem is the of honeybees to pesticides and other chemicals used in almond production. 19. 20. and One sustainable solution is to make habitats and species within almond orchards more stable. By creating various ecosystems and introducing other insects among almond trees, at least we can ensure enough food supply for bees and even lower the use of pesticides for almond trees in the long run. A 16. (A) therefore (B) however C17. (A) make A (B) made 18. (A) faced with a great increase in demand (C) looked after by beekeepers carefully (B) delivery 19. (A) cultivation 2 (C) in addition (D) for a start (C) making (D) to make (B) raised in their natural environment (D) physically removed from their habitat (C) exposure (D) restriction asant (D) particular

各位大神 求解 拜託🙏🆘

CA 梁柱 一截面積是原來的兩倍 22. Two girders are made of the same material. Girder A is twice as long as girder B and Bo DE C B³ has a cross-sectional area that is twice as great. The ratio of the mass density of girder A to the mass density of girder B is: 質量密度 A) 4 B) 2 C) 1 D) 1/2 E) 1/4 29. During a short interval of time the speed v in m/s of an automobile is given by v=at² + bt³, where the time t is in seconds. The units of a and b are respectively: A) m-s²; m-s4 s³/m; s4/m dv=at+bt² B) C) m/s²; m/s³ D) m/s³; m/s4 E) m/s4; m/s5 34. The position y of a particle moving along the y axis depends on the time t according to the equation B) C) D) E) 質固定,体2倍 #%# 40. The coordinate of an object is given as a function of time by x = 7t-31², where x is in meters and t is in seconds. Its average velocity over the interval from t = 0 to t = 2 s is: A) 5 m/s X₂=0, X₁₂=14-12=2 B) -5 m/s 11 m/s C) D) -11 m/s (2-0)/2=1 E) -14.5 m/s 41. The coordinate of a particle in meters is given by x(t) = 16t-3.01³, where the time t is in seconds. The particle is momentarily at rest at t = A) 0.75 s A y = at -bt². The dimensions of the quantities a and b are respectively: A) L²/T, L³/T2 B) L/T², L²/T C) L/T, L/T² D) L³/T, T²/L E) none of these 1.3 s 5.3 s 7.3 s 9.3 s V(t) = 16-9+² =- [9t²-16) =-(3t+4) 13t-4) =+= 0.75 45. The velocity of an object is given as a function of time by v = 4t-312, where v is in m/s and t is in seconds. Its average velocity over the interval from t=0 to t=2 s: A) is 0 B) is -2 m/s C) is 2 m/s D) is -4 m/s E) cannot be calculated unless the initial position is given 49. A particle moves along the x axis according to the equation x = 61² where x is in meters and t is in seconds. Therefore: E B) C) D) E) A) the acceleration of the particle is 6 m/s² t cannot be negative the particle follows a parabolic path each second the velocity of the particle changes by 9.8 m/s none of the above

請問第九題： 隨著人口越多，情況只會越來越糟。____ ，我們必須做出某些大改變。 空格答案是換句話說，想問這裡用理論上為什麼不可以？

44 Lesson Four B65. (6. (A) reaction (A) 7. (A) into (B) 8. (A) dies (2) 9. (A) In theory (10. (A) fought ) 5. (A) keeping a; eye (B) taking a; toll (B) composer (B) from (B) dying (B) In vain (B) fighting (D) carrying; through (D) switch (D) with (D) die (C) In the beginning (D) In other words (D) fights (C) fight (C) having; at heart (C) scale (C) upon (C) died ※第三篇 In December 2020, members of Singapore's private 1880 club likely noticed a new item on club restaurant's menu. Specifically, the restaurant became the first place in the world to offer 1 meat. The meat itself was developed in a 2. by a start-up based in San Francisco called Eat J Josh Tetrick, one of Eat Just's founders, expressed great praise 3. Singapore for its careful efficient process for approving cultured meat for sale. Tetrick has made public remarks about how promotion of cultured meat could, in the long run, help 4. the fight against climate cha However, some scientists doubt 5. this is the case. REDMI NOTE 8 PRO TAI QUAD CAMERA formed in Finland found that for some types of meat, such as beef and lamb. cultured form indeed had a far lower impact 6. the environment. Howeyer for oth

想問3-9的a跟c

Problems 3-1. Explain the difference between *(a) random and systematic error. (b) constant and proportional error. *(c) absolute and relative error. (d) mean and median. *3-2. Suggest two sources of systematic error and two sources of random error in measuring the length of a 3-m table with a 1-m metal rule. 3-3. Name three types of systematic errors. *3-4. Describe at least three systematic errors that might occur while weighing a solid on an analytical balance. *3-5. Describe at least three ways in which a systematic error might occur while using a pipet to transfer a known volume of liquid. 3-6. Describe how systematic method errors may be detected. *3-7. What kind of systematic errors are detected by varying the sample size? 3-8. A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative error caused by this result if the mass of gold in the sample is (a) 500 mg. (b) 250 mg. V(c) 125 mg. (d) 60 mg. 3-9. The method described in Problem 3-8 is to be used for the analysis of ores that assay about 1.2% gold. What minimum sample mass should be taken if the relative érror resulting from a 0.4-mg loss is not to exceed *(a) -0.1%? (b) -0.4%? (c) -0.8%? (d) - 1.1%? 3-10. The color change of a chemical indicator requires an overtitration of 0.03 mL. Calculate the error if the total volume of titrant is percent relative (a) 50.00 mL. (c) 25.0 mL. 3-11. A loss of 0.4 mg of Zn occurs in the course of an percent relative analysis for that element. Calculate the error due to this loss if the mass of Zn in the sample is *(b) 10.0 mL. (d) 30.0 mL. 190 (c) 188 (d) 4.52 x 103 4.63 x 103 4.53 x 10 ³ √6 *(a) 30 mg. (b) 100 mg. *(c) 300 mg. (d) 500 mg. 3-12. Find the mean and median of each of the following sets of data. Determine the deviation from the mean for each data point within the sets, and find the mean devi- Vation for each set. Use a spreadsheet if it is convenient. *(a) 0.0110 0.0105 (b) 24.53 0.0104 24.68 24.81 24.77 39.61 862 (f) 850 MA 3-13. Challenge Problem: Richards and W the molar mass of lithium and colle data. 24.73 Experiment 1 2 3 4 5 6 194 447 X 10 7 448 X 107 4.58 X 10 (a) Find the mean molar t workers. (b) Find the median molar ma (c) Assuming that the cam molar mass of lithium is the absolute ertor and of the mean value demi Willard. (d) Find in the chemical ues for the molar mus since 1910, and ag a table or spreadshera 1817 given in the a Richards and Willd. Com mass versus year to la of lithium has chang Suggest possible abruptly about 18 ant de (e) The incredibly deals Richards and W that major changes will occur. Disc calculation in pat (f) What factors ha since 1910? (g) How would you mass? 6See Chapter 2 of Applications of Microsoft Excel in Analytical Chemistry, 4th ed., for information about statistical 7T. W. Richards and H. H. Willard, J. Am. Chem. Soc., 1910, 32, 4, DOI: 10.1021/ja01919a002. built-in statistical functions. "Answers are provided at the end of the book for questions and problems marked with an asterisk The I of ₂ or inc rce of able vas error c often in individu ate resul data in rtainties. dimensio andom e analysts The result

求求各位大神幫我解第3、4題？ 第一題是（5，20） 第二題是（3，21） 不知道我算的對不對， 麻煩各位大神幫幫我🙏🙏🙏

Problem 5: SE & IE A college student has two options for meals: eating at the dining hall (D) for $6 per meal, or eating a bread (B) for $1.50 per meal. Her budget is $60. 1. Draw the budget constraint showing the trade-off between dining hall meals and bread. Assuming that she spends equal amounts of expenditure on both goods as her optimum choice. What is this optimal choice (D,B)? Label the optimum as point A. 2. Suppose the price of a bread now rises to $2. Using your diagram from part (1), show how the change in price affect the budget line. Assume that the student now spends only 30 percent of her income on dining hall meals as her optimal choice. What is this optimal choice (D',B')? Label the new optimum as point B. 3. Use points A and B to draw a demand curve for bread. 4. Please write down the definitions of inferior good and normal good. For the student, is bread a normal good or an inferior good? Please explain. (Hint: Changes in consumption caused by this price change can be decomposed into substitution effect and income effect.)

想問這題的C C選項指的不應該是說 買賣NFT比想像中複雜 但文中所指NFT的買賣那麼複雜，那為什麼不是錯的勒

第 39 至 42 題為題組 As we progress further into the digital age, new terms and technologies seem to pop up everywhere. The latest of these is "NFTs" or non-fungible tokens. If something is fungible, it means that it is able to be replaced by an item of identical value, such as currency. Therefore, a non-fungible token cannot be interchanged; it is unique. NFTs are linked to the blockchain-the digital database that supports online cryptocurrencies like Bitcoin and Ethereum. Let's take a deeper look at NFTs and how people can buy, sell, and trade them. In simple terms, NFTs are one-of-a-kind digital works of art. They can take the form of GIFs, tweets, virtual trading cards, images of physical objects, and more. NFTs tend to attract investors who believe in the future of blockchain technology, and who are willing to spend top dollar to obtain a new form of digital currency. For example, Jack Dorsey's first tweet sold for $2.9 million, a video clip of a LeBron James slam dunk sold for over $200,000, and a decade-old "Nyan Cat" GIF sold for $600,000. Clearly, the NFT market is something to be taken seriously. So, the next question is: how does one participate in it? modi naging dato Basically any digital image can be purchased as an NFT. But before buying one, there are a y things to bolet gold sin few things to consider. You need to think about which marketplace to buy from. You also need to b bount itnorn s. slagg 21.05 think about what kind of digital wallet you'll be using to store the NFT, and which type of gos, of 10 and ab cryptocurrency you'll use to purchase it. The process of selling your NFT will vary based on which Dead orie ni einshins Imp leve moitoolsh marketplace you use. However, the process is simple enough-first, you'll upload your content to anthow ad of Lite to 2012 63 ele ning rolls of abno the marketplace to turn it into an NFT. Then, add details about the work and set the price. NFTS bengoof mi cont long as they have may sound confusing, but anyone is able to take part in this new digital market as a digital wallet and a little bit of cryptocurrency. zulli 120d so ausu gaivollot sa to doir'W.20 con cach these All th Ver DHE KU A