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.

1.21謝謝！

-801. complement form and perform the following operations (note that the sum is +10,627 and requires five digits and a sign). (a) (+9,286) + (+801) (c) (-9,286) + (+801) (b) (+9,286) + (-801) (d) (-9,286) + (-801) signed-2's-complement Termissh. Di sdi 101 1.20 Convert decimal +49 and +29 to binary, using the representation and enough digits to accommodate the numbers. Then perform the binary equivalent of (+29) + (−49), (−29) + (+49), and (−29) + (−49). Convert the answers back to deci- mal and verify that they are correct. 1.21) If the numbers (+9,742)10 and (+641)10 are in signed-magnitude format, their sum is (+10,383)10 and requires five digits and a sign. Convert the numbers to signed-10's- complement form and find the following sums: (a) (+9,742) + (+641) (c) (−9,742) + (+641) (b) (+9,742) + (-641) (d) (−9,742) + (−641) 1.22 Convert decimal 9,045 and 337 to both BCD and ASCII codes. For ASCII, an even parity bit is to be appended at the left. (1.23) Represent the unsigned decimal numbers 609 and 516 in BCD, and then show the steps necessary to form their sum.

1.30 plz用中文講解謝謝！

The message "Pass 0.12" is to be sent via communication line. For this, each character of the message should be encoded into a seven-bit ASCII code including the period and the it. Write the expression for the message sent. space. Each ASCII encoded character should be then encrypted by adding binary 101 to 1.29* Decode the following ASCII code: 10000110101110 1000010 1000001 1000010 1000010 1000010 1000111 1000101. 1.30 The following is a string of ASCII characters whose bit patterns have been converted into hexadecimal for compactness: 47 2E 5C 42 CF CF CC C5. Of the eight bits in each pair of digits, the leftmost is a parity bit. The remaining bits are the ASCII code. (a) Convert the string to bit form and decode the ASCII. (b) Determine the parity used: odd or even?

求解

統計學11002期末考 已作答:0/7 題 姓名:處妍論, 測驗及格:60分 3 根據學籍資料顯示,有101 位修畢大學投資課程的學生,其學期平均成績的標準差為0.710,而 61 位退選此一課程的學生,其平均成績的標準差為 1.222.此資料是否顯示,修畢與退選財務會計課程的學生其學期平均成績的變異數確有差異?使用0.05 的顯著水 準。 (10%) 大小 • BIUSxxA-A- 三 LI @ 10分 交卷 上一頁 下一頁 Copyright © Southern Taiwan University of Science and Technology. All rights reserved. 南臺科技大學計網中心(STUST Computer Network Center) 建置 選課資料最後更新日期:2022年06月07日 FA M fo ::: 201 £11 32°C 小雨 ^ 后

求解答案是否正確

Multiple-choice questions: (70 points) write the letter of statement that is not true: 1. A.B.U The Drude Model: (a) It is a classical approach using concepts from the kinetic theory of gases. (b) A relaxation-time approximation is used where the probability of collision is l/t. (c) No forces act on the electrons in between collisions. (d) It predicts accurately the electronic heat capacity of metals. 2. The Sommerfeld Model: (a) The crystal potential is replaced by an average Coulomb potential. (b) The separation of states is so close that a continuum model can be applied. (c) The electrons are highly localized due to a strong crystal potential. (Q) The energy of the highest occupied state at 0 K is the Fermi energy. 3. Density of states in k-space, N(k): (a) N(k) is determined by the boundary value conditions. (b) For lattices in any dimensions, N(k) is constant in k-space. (C) N(k) depends on the direction and magnitude of k. (d) It is directly proportional to the volume of the crystal. E影響, c 4. The Fermi surface of a metal: (a) is responsible for many of the transport properties of the metal, (b) depends on the nature of the chemical bonds, (c) is always a sphere, (d) can involve mixing of electron orbitals. ✓ 5. The conductivity of a material () increases with the mobility of its carriers, (b) increases with the density of carriers, (C) it is inversely proportional to the energy gap. cogu changes with temperature. 6. BID Plasmons: (a) They are an important characteristic of the Sommerfeld electron gas model. (b) Plasmons occur spontaneously in metals. (c) They are related to charge density oscillations. (d) The Plasmon energy is typically of the order of 10 eV. The Fermi energy Ef in intrinsic semiconductors 8) is usually close to y E, at OK (b) it ACiD. can increase or decrease with temperature depending on the ratio of hole and electron effective masses, (c) it represents the point at which the probability of occupation is 12, even though there may not been any states with that energy, (d) its value relative to the electronic bands must remain unaffected in the presence of defects or interfaces.

有人知道這怎麼算嗎 ？ 畫黑線的那裡 （Cos25度）

The solution requires that we determine the component of the f because the component of the force that was pushing down on Fparallel (Force) (cos 25°) = (125 N)(0.906) = 113 N W = Fparalleld = (113 N)(56 m) = 630 J Getting a piano into a truck isn't easy, so we often use a ramp to the distance we have to apply the force is greater. So in a way, work done remains the same. Play around with the Ramp and Pi

我不太會算.. 可以幫幫我嗎 感謝感謝🙏🙏 #物理

9/28課堂練習 (1)將4.2×10 m/s除以0.57 ms,並以m/s2為單位表示 (2)把3.63105 m和2.13103 km相加 (3)下列數值(a)以科學符號(scientific notation)表示 (b)有效數字(significant figure)的數 0.0008, 3.14 x 107, 2.998 x 10-9, 550 x 106, 0.014 x 109

7.9.10🙏🙏🙏

. → NVBENVAS 17AUG20_ 三 2-26 2 Chapter2 需求、供給與市場均衡 (1) 7. 假設商品 X 與Y為替代品。在其他條件不變下,下列何者會造成商品 X 的價 (c)對 (d)對 2. 假設考 均衡 3. 假設 會議 4. 假設 全世 5. 假 2本 Far Ar Yiro: Sci 格上漲: (B)商品 Y的生產要素價格上漲 (A)商品 Y發生技術進步 (C) 生產商品 Y的廠商家數增加 (D)以上皆是 8. 假設商品 X與Y為互補品。在其他條件不變下,下列何者會造成商品 X 的價 格下跌: (A)商品發生技術進步 (B)商品 Y的生產要素價格下跌 (C) 生產商品 Y的廠商家數減少 (D)以上皆非 (1) 9. 假設供需法則成立。下列何者會造成一項商品其均衡數量的增加? (A) 技術進步 (B)生產要素價格上漲 (C)買者的所得增加 (D)以上皆是 (110. 假設供需法則成立。下列何者會造成一項商品其均衡價格的上漲? (A) 技術進步 (B)生產要素價格上漲 (C)買者的所得增加 (D) 其互補品的價格上漲 ( ) 11. 當市場價格高於均衡價格時, (A)市場存在超額需求 (B)市場存在超額供給 (C) 市場價格未來會下跌 (D) 以上 (B)與(C)均正確 ( ) 12. 假設其他條件不變。如果股市參與者今天預期某檔股票其價格未來會下跌, 則該檔股票今天的成交金額會較昨天的來得 (B) 小 (C)一樣 (A)大 (D) 以上皆有可能 个 + | 不 二、問答題 1. 假設小明對商品 X 的需求函數為Q=5- P. -0.3° +0.2 + QP,其中2. 為需 求量,P與P分別是商品 X與Y的價格,為小明的所得,且P、為小明對X 的價格預期水準。根據以上的需求函數回答以下的問題: (a)小明對商品 X的需求是否合乎需求法則? (b)對小明而言,商品 X與Y是替代品還是互補品?

急 求救統計 #6 （可支薪）

6.The National Science Foundation (NSF) sponsored a study on girls participation in informal science, technology, engineering, or mathematics (STEM) programs. The results of the study were published in Cascading Influences: Long-Term Impacts of Informal STEM Experiences for Girls (March 2013). The researchers sampled 174 young women who recently participated in a STEM program. They used a pie chart to describe the geographic location (urban, suburban, or rural) of the STEM programs attended. Of the 174 participants, 107 were in urban areas, 57 in suburban areas, and 10 in rural areas. a. Determine the proportion of STEM participants from urban areas. b.Determine the proportion of STEM participants from suburban areas. c.Determine the proportion of STEM participants from rural areas. d. Multiply each proportion in parts a-c by 360 to determine the pie slice size (in degrees) for each location. e.Use the results, part d, to construct a pie chart for geographic location of STEM participants. f.Interpret the pie slice for urban areas. g.Convert the pie chart into a bar graph. Which, in your opinion, is more informative?

急！求救 #6 8 9 如果需要酬勞可私下談 （ex.$70題）

pie participation in informal 6.The National Science Foundation (NSF) sponsored a study on girls' science, technology, engineering, or mathematics (STEM) programs. The results of the study were published in Cascading Influences: Long-Term Impacts of Informal STEM Experiences for Girls (March 2013). The researchers sampled 174 young women who recently participated in a STEM program. They used a pie chart to describe the geographic location (urban, suburban, or rural) of the STEM programs attended. Of the 174 participants, 107 were in urban areas, 57 in suburban areas, and 10 in rural areas. a.Determine the proportion of STEM participants from urban areas. b.Determine the proportion of STEM participants from suburban areas. c.Determine the proportion of STEM participants from rural areas. d. Multiply each proportion in parts a-c by 360 to determine the pie slice size (in degrees) for each location. e.Use the results, part d, to construct a pie chart for geographic location of STEM participants. f.Interpret the pie slice for urban areas. g.Convert the pie chart into a bar graph. Which, in your opinion, is more informative? 7. All high way bridges in the US are inspected periodically for structural deficiency by the FHWA. Data from the FHWA inspections are compiled into the National Bridge Inventory (NBI). Classify each variable below as quantitative or qualitative. a. Length of maximum span (feet). b. Number of vehicle lanes. c. Toll bridge (yes or no). d. Average daily traffic. e. Condition of deck (good, fair, or poor). f. Bypass or detour length (miles). g. Route type (interstate, U.S., state, county, or city) 8. The NBI data were analyzed and the results made available at the FHWA Web site. Using the FHWA inspection ratings, each of the 608,272 highway bridges in the US was categorized as structural deficient, functionally obsolete, or safe. About 13.5% of the bridges were found to be structural deficient, while 3.5% were functionally obsolete. a. What is the variable of interest to the researchers? b. Is the variable of part a quantitative or qualitative? c. Is the data set analyzed a population or a sample? Explain. d. How did the NBI obtain the data for the study?