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.

第八題 答案：（D) 為什麼選（D)which， 而不是選（A)where 第11題 答案A 為什麼不能用（d)itself

I VY 141 8. The planning committee at National Bank is deciding months. (A) where (B) that (C)/ how which new branches to open over the next six 9. ------- needs to meet Mr. Parkhurst this afternoon to review the financial figures. (A) Some (B) Them (C) No one (D) Whoever 10. Latex Technologies is offering free trial versions of its new database to -------has a current subscription. (A) whomever (B) wherever (C) whenever (D) whoever

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35) A patient receives 10 mrads of gamma radiation. If the factor that adjusts for biological damage for for gamma radiation is 1, how many mrems did the patient receive? A) 2 mrem B) 5 mrem C) 10 mrem D) 20 mrem E) 200 mrem Answer: C Objective: 5.3 Global Outcomes: GO4

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34) A patient receives 4.2 × 103 mrads of iodine-131, which emits ß-particles. If the factor that adjusts for biological damage is 1 for beta particles, how many rems did the patient receive? A) 4.0 B) 0.40 C) 0.30 D) 2.0 E) 40. Answer: A Objective: 5.3 Global Outcomes: GO4

希望有人能幫我解答填空 我的英文真的很爛Q

14 | Working English 2 Listening Comprehension A. 5 Listen to the talk. Check the adjectives you hear. good real free honest former different organized ☐ happy employees. 5. This means they are 6. They can offer a work for the company. interactive positive careful interested miser Our company dig nimincia quais fadour et minute nobit ut B. © 5 Fill in the blanks with the adjectives you checked from above. Then listen again. 1. Today, I'm going to offer an game plan to help you do this. 2. A place to start your research is on the company's website. 3. Keep in mind that company websites will always present a company. 4. These sites contain comments and Creating opportunities o reviews from sing partner or customer. 7. After you have gathered all of this information, you can decide if you are still in working for them. C. Circle True or False for each statement. 1. The speaker believes view of the to share their feelings about what it was really like to perspective of what it's like to deal with the company as a

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The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B. The applied forces are Fi 10 kN and F2 = 4 kN. Determine the minimum fatigue factor of safety based on achieving infinite life. If infinite life is not predicted, estimate the number of cycles to failure. Also check for yielding. 30 mm- A 192 mm 40 mm 12 mm 240 mm 192 mm -45 mm F₂ 240 mm All fillets 1.5 mm R. 192 mm 42 mm 72 mm 12 mm B 30 mm

請問SQ3R要怎麼寫 By特教系資賦優異概論

請問大一統計學這兩題有人看得懂嗎🥲

2. To study the attitude of mother and father towards their daughter participating in the outdoor games, a sample of 200 fathers and 250 mothers was investigated. In these two samples, 120 fathers and 50 mothers preferred their daughter to go for outdoor activities. Can it be concluded at a=0.01 level of significance that the proportion of father is significantly higher than that of mother in preferring their daughters for outdoor activities? 3. A firm has a generous but rather complicated policy concerning end-of-year bonuses for its lower-level managerial personnel. The policy's key factor is a subjective judgment of "contribution to corporate goals." A personnel officer took samples of 24 female and 36 male managers to see whether there was any difference in bonuses, expressed as a percentage of yearly salary. The data are listed here: Gender Bonus Percentage Female 9.2, 7.7, 11.9, 6.2, 9.0, 8.4, 6.9, 7.6, 7.4, 8.0, 9.9, 6.7, 8.4, 9.3, 9.1, 8.7, 9.2, 9.1, 8.4, 9.6, 7.7, 9.0, 9.0, 8.4 10.4, 8.9, 11.7, 12.0, 8.7, 9.4, 9.8, 9.0, 9.2, 9.7, 9.1, 8.8, 7.9, 9.9, 10.0, 10.1, 9.0, 11.4, 8.7, 9.6, 9.2, 9.7, 8.9, 9.2, 9.4, 9.7, 8.9, 9.3, 10.4, 11.9, 9.0, 12.0, 9.6, 9.2, 9.9, 9.0 (1) Is there significant evidence that the mean bonus percentage for males is larger than the mean bonus percentage for females? Use a a=0.05. (2) Estimate the difference in the mean bonus percentages for males and females using a 95% confidence interval. Male

想問這題(2小題)的解體思路 麻煩各位了

3.13. A detective has evidence that 2 persons were involved in the crime he is investigating. Three suspects with very similar criminal records were seen close to the crime scene. Two of them are believed to be guilty. What is the probability that the first suspect being interviewed is guilty? Considering that the detective has managed to confirm one interviewee as having been involved in committing the crime, what is the probability that the next person to be interviewed is innocent?

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Chrome 檔案 Sylves Scores M Gmail ▸YouTube | 地圖 Pearson eText Purchase Options Study Area User Settings Course Home Ghe binding energy of a two-par X + openvellum.ecollege.com/course.html?courseld=17667848&OpenVellumHMAC=9c8d5dd7baa0c70ec3a75db4e52f2d39#10001 Document Sharing Course Tools 檢視 歷史記錄 書籤 設定檔 分頁 視窗 說明 單 > 翻譯 The position of a 280 g object is given (in meters) by x = 5.1 t³ - 8.0 t²-44 t, where t is in seconds. https://session.masteringphysics.com/myct/itemView?assignment ProblemID=176946106 10月 13 Part A tv Determine the net rate of work done on this object at t = 2.0s. Express your answer using two significant figures. Pt 2.0s= = Submit Part B VAΣO Pt=4.18= = Request Answer Determine the net rate of work done on this object at t = 4.1s. Express your answer using two significant figures. VAE P Pearson ? 1999+ ? W Caright © 2022 Pearson Education Inc. All rights reserved. Terms of Use | Privacy Policy. Permissions Contact Us | W G3 ✩ 10月13日 週四 上午 12:38 I Constants 更新