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.

想請問一下這題怎麼寫？ 感謝各位大神🥺

2. The following table summarizes results from an experiment in which subjects were first classified as smokers or nonsmokers. After these subjects were given a treatment, later they were again classified as smokers or nonsmokers. After-smoker After- non-smoker Before- smoker 40 14 Before- non- smoker 5 80 2-1. How many subjects changed their smoking status after the treatment? 2-2. How many subjects appear to be unaffected by the treatment? 2-3. Using the appropriate frequencies, find the value of the test statistic. 2-4. Using a 0.025 significance level, find the critical value, and make your conclusion. 2-5. Based on the preceding results, do you think this treatment is really benefit to help people quit smoking?

以下是心統的題幹與問題 想請問第以下兩題是否有計算錯誤？

1. Any of you who have listened to children tell stories will recognize that, unlike adults, they tend to recall stories as a sequence of actions rather than as an overall plot. Their descriptions of a movie are filled with the phrase "and then...." An experimenter with supreme patience asked 50 children to tell her about a given movie. Among other variables, she counted the number of "and then..." statements, which is the dependent variable. The data follow: 18 15 22 19 18 17 18 20 17 12 16 16 17 21 23 18 20 21 20 20 15 18 17 19 20 23 22 10 17 19 19 21 20 18 18 24 11 19 31 16 17 15 19 20 18 18 40 18 19 16 簡單翻譯:心理學家請小孩描述電影情節,並記錄他們使用「然後」的次數,50 位小孩的次數 如上。

求解🙏

The photoelectric effect can be used to measure the value of Planck's constant. NOTE: The following data are fictional, and will give a result that is quite different from the real value of Planck's constant. Be sure that you do not use the real value of Planck's constant in any calculations here. 1 S -1 Suppose that a photoelectric effect experiment was carried out using light with v = 7.56 × 10¹4 s-¹, and ejected electrons were detected with a kinetic energy of 2.41 × 10-¹1 J. The experiment was then repeated using light with = 9.81 × 10¹4 s and the same metal target, and electrons were ejected with a kinetic energy of 9.09 × 10-¹1 J. Use these data to find a value for Planck's constant (in J • s). Hint. It may help to start by thinking about how you would calculate the metal's binding energy if you already knew Planck's constant. Submit Answer S Try Another Version 2 item attempts remaining

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

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Equilibrium constant calculations often have as much as 5% error X in them because (A)molar concentration and pressures are often used. (B)there is experimental error involved in measure K. (C)the chemical activity should be used. (D)approximation are often used to solve very difficult calculations. (E)all of the above. 【83 中興B)

想問這題的39題 答案是C 想問A選項跟B選項 分別代表哪些字（文章中） 答案主要在第四段 但是我覺得founder跟holder還有sponsor意思也不太接近

第4頁 共7 頁 109 年指考(補考) 英文考科 五、閱讀測驗(占32分) 說明:第36題至第51題,每題請分別根據各篇文章之文意選出最適當的一個選項,請畫記 在答案卡之「選擇題答案區」。各題答對者,得2分;答錯、未作答或畫記多於一個 選項者,該題以零分計算。 第36 至39 題為題組 I am thrilled to welcome you to the 20th annual Roger Ebert's Film Festival, a special event in partnership with the University of Illinois College of Media, the greater Champaign-Urbana community, and movie lovers everywhere . Little did we think, back in 1999, that our experiment in reinventing the film festival to make a festival that celebrated overlooked films, formats and genres, and the women and men who made those films would become a landmark annual event in the life of our community and contribute to the renovation of the remarkable Virginia Theater, our home from the very beginning. In selecting the films for this year, Chaz Ebert and I looked to women filmmakers for our inspiration. Fully half of our films are either directed or co-directed by women, and several others have women in powerful produeing roles. Films directed or co-directed by women include “13th," directed by Ava DuVernay, “Belle," directed by Amma Asante, and "American Splendor," directed by Shari Springer Berman and Robert Pulcini, And women producers include Lynda Obst and Emma Thomas ("Interstellar”) and Ruth Ann Harnisch and Danielle Renfrew Behrens (“Columbus"). Our opening night film is “The Fugitive," directed by University of Illinois alumnus Andrew Davis. Our Saturday night film is the classic "The Big Lebowski.” Our guest will be the Hollywood legend Jeff Dowd. And of course The Alloy Orchestra will be back, this year with “A Page of Madness,” the classic Japanese silent film. We would like to thank our sponsors, volunteers, festival pass holders, and individual ticket holders for their welcome participation in this endeavor. We look forward to your unwavering support as our festival continues to blossom each spring in central Illinois. We especially want to thank the University of Illinois for their loyal support year after year. This festival is Roger Ebert's gift to his hometown, and for that we thank him and his wife Chaz. They continue to be a remarkable team, and it is an honor to work with them. 36. Who is most likely the writer of this passage? (A) The President of the University of Illinois. (B) A movie critic who is a friend of the Eberts. (C) A member of the Festival's organizing committee. (D) A journalist who reports stories about the Festival. 37. What was the purpose of reinventing Roger Ebert's Film Festival in 1999? (A) To work closely with the University of Illinois. (B) To help restore a building associated with the Festival. (C) To establish a signature annual event in the community. (D) To honor people who made films that were not box-office hits. 38. What is the focus of this year's film selection? (A) Films produced or directed by women. (B) Hollywood classics and legends. (C) Stories featuring female leading roles. (D) Diversity in formats and genres. 39. Which of the following is NOT included in the writer's acknowledgement remarks? (A) The founder of Roger Ebert's Film Festival. (B) A student who purchased a pass to the Festival, (C) The producer of the Festival's award-winning film. (D) A company which provided financial support for the Festival. -4.

3 請問為什麼

不 汪人 【 tTetake the course. 一_(A)and _(B)but (or 0Df 攻 )2.1was sure_ my experiment results were accurate, but my teacher said 7/ otherwise. (A) why (B)that (C) where (D) when 字 六 )G.Animal lovers Kept taking 也e stray dogs in 了is neighborhood \ HeEES (A) and (B)tobe (C)be (D)and be )4.Emily only travels 站 countries because English 1s the only language she can speak- (A) speaks-English (B) English-spoken (C) English-to-Sspeak (D) English-speaking 計生 、人人乒2人生iing fora while. Ronald decided that his newborn babv Would go

1.7 不懂為什麼不是description statistics 是因為後面的change 有經過計算嗎

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英文指考109 請問第20題為什麼是A？ 然後alone跟alike差別在哪裡？ 謝謝ଘ(੭ˊᵕˋ)੭ฅ ̑̑ෆ⃛

全全廬 全 AA人LVSDLU 2 Scientific discovery can take Various forms. One ofthem is “serendipity,” the Juck offinding vaJuaplje thingSs unintentionally. Serendipity was at Work when Alexander Fleming discovered penicijlin, fhe antlbliotic miracle. Fleming had long been known for having an untidy ]aboratory. One morning jm 1928, 了is _16_proved Very fortunate. It Was his first day coming back to Work afteralong Vacation. Before the yacation,hce _47 _悶 the Sink anumber ofpetri dishes in which he had been growing bacteria. While he was sorting trougfh 和he long __18 dishes of germs that morning, he observed that some ofthe dishes were contaminated wi也a fungus, Which had ruined his experiment. He was about to _19 the dishes, but he noticed that 同 one dish'_the bacteria had failed to grow in the area around the funeus. This accidentaJ finding gave rise fo subsedueht researeh that led to the disceovery ofpenicillin一a drug that has since saved m記ions of Jiyes. Chanee _20_, however may not be enough to make key discoveries Jike this. The scienftist musf and open mind to detect the importance of the unforeseen incident and tfo use have a prepared constructively. (B) opinion (C) seandal (D) disorder 及 0之16. (6) me明 人和 (C) was piling (D) might have piled 生 贍 17. (A) 和 e 0 (C) unattended (D) misunderstood 〔.18.(A) disable 主 (C) eateh up (D)eany on 19. (A) toss out (C) above (Dbxahead (B) alike 292 ,,歸過填(古10分)