請問這題酸鹼滴定要怎麼算 卡了很久還是想不出來 如果是當量點的話H+ OH-莫耳數不是相同嗎 這樣不是PH=PKa嗎

BA 48. Calculate the pH at the equivalent point in the titration of 40ml of 0.025M benzoic ↳ 苯甲酸 CH602 84+6+32 acid(Single proton acid) with 0.5M NaOH. (Ka of benzoic acid = 6.3x10-5) A6.50 (B) 8.21 (C)10.01 (D) 7.30 [base). PH= Pka + hoy (12121212 = Pkat bay Tacid) (m) mx份起 0.025x0,04x122 122 .C-OK =122

有人可以告訴我下面這幾題的答案嗎？老師剛剛臨時出的，感謝 1. The author's writing style is known for its _______ and nuanced language. (A) eloquence (B) brev... 繼續閱讀

1. The doctor's prognosis for the patient's condition was __________, giving little hope for recovery. a) pessimistic b) optimist... 繼續閱讀

想問30.跟45.題🙇🏻‍♀️

搭配速 解答見 價 500 000 500 000 2023/05/10 29-30 為題組 Riddles have been a popular pastime that people all over the world have enjoyed for hundreds of years. Many say that the earliest riddles were shown as messages from God. Back in old times, Iriddles were mainly about the sun, the moon, the rainbow, and the wind. The Greek gods took their I riddles more seriously than we do today One of the great Greek poets, Homer, had died of shame I I I r because he could not answer a riddle. Here are some riddles for you. Are you ready? Riddle 1: In CHOCOLATE, there are three things to drink. What are they? Riddle 2: What keys won't open doors? i Riddle 3: I begin with and end with , and I am full of T. What am I? Riddle 4: What is black when it is clean and white when it is dirty? riddle 謎題 Greek 希臘的 BG D pastime poet 詩人 29. Which statement is NOT true Riddle Riddles have a long history. message 訊息 shame 羞愧 (B) Old riddles were usually about the nature. (C) Homer died because he was old and sick. DThe answer to Riddle 4 is Blackboard. 30. What are the answers to Riddle 2 and Riddle 33 (A) "Rookie" and "Ticket." (C) "Donkey" and "Tonight." statement God 上帝 usually 通常 mainly 主要地 rookie 新手 donkey 驢子 teapot 茶壺 (B) "Monkey" and "T-shirt." D) "Turkey" and "Teapot." I

（算減滴定） 請問這題要怎麼算呢🙏🙏想了很久還是想不到怎麼算🥲

Titration of 0.52 g of pure Na2C2O4 (134.00 g/mol) required 128 mL of KMnO4. What is the molarity of the KMnO4 solution? The chemical reaction is 2MnO4 +5C204 + 16H* → 2Mn²++10CO2 + 8H20 Andr lottle 11 JL. . CHAZ

我想請問 原本fn只在所有compacts上一致收斂 D裡面會不會也包含沒辦法closed and bounded的部分 但我最後要證明的卻是在整個D上f都連續 這樣①③的選擇會不會只證明f在D中的任何compacts連續呢 如果會的話要怎麼改善證明 （高微證明小白求解..

Question 2 [10] Let {fn (2)} be a sequence of continuous complex functions defined on D C C and f(z) be a complex function defined on D. Prove by e-N definition that if fn(z) converges uniformly to f(z) on compacts in D, then the limiting function f is also continuous. 0₁0. fn 3 f for z For every Z in K E > = N(6) € ₁ s.t. Unz N₁ | fn (2) - f(z)] < 1/10 N= . in any compact sets K≤p. @fn 75 20, 2 820 sit.lzx]<8>lfe)-f(x)]<- continuons for z in D. For every z, & in D. VE>O, we choose the above N and f if Iz-*|< 8, then s.t | f(2)= f(a)| = |f₁z) - fn(z) + tn (2) - fn(x) + fn(x) – frasl ≤ | fn(z) - f1z)| + | fn(²2) - fn(x) |+| fricas) _flox) | = D E 1/4 + 1/3+1/²/3 = 3 =.E.

求解2 第三行第一段時間不是說不能確定了嗎🥺

Advanced 10 5 SA ENGLISH TH Having bip oesn't have to With t such as Beetho- All suffered fro treatment, the can't live a n 66 The Ups and Downs of Bipolar Disorder L ife in the modern world can be confusing and fast-paced. Every day, our brains are forced to make sense of an endless stream of information from the Internet, TV, and newspapers. As if that weren't enough, we must balance our social and work schedules while still making time for our families. It's no wonder that many people sometimes feel overwhelmed by the ups and downs of their life. But for people with (bipolar disorder, this roller coaster ride never seems to end. Yet many people suffering from this disease don't even know they have it. Bipolar disorder is a condition in which people have trouble controlling their moods. Instead of having a balanced temperament, patients often move between extreme excitement and depression. In less serious cases, it can cause a person to be overly energetic and talkative throughout the day. It could also make the sufferer become anxious about minor things that wouldn't bother most people. In severe cases, people can become extremely depressed and lose their will to live. sbu Scientists are still unsure why people develop bipolar disorder, but many 15 believe it is caused by a combination of internal and external factors. They believe it comes from a chemical imbalance in the body, which may be genetic. But when this is combined with high levels of pressure, bipolar disorder seems to worsen. Re Since bipolar disorder is complex, it can be difficult to treat. One approach to get it under control is through medication. The drug lithium is often prescribed, 20 since it can control patients' moods in both the manic and depressive stages. Psychotherapy is also used to help people change the negative thoughts that frequently accompany their severe mood swings. 196

化學 PH值計算（多質子酸解離） 請問這題錯在哪裡呢😭

0.3M Na2HPO4 Example #1: Determine the pH of 0.300 M sodium hydrogen phosphate, Na₂HPO4. Phosphoric acid, H3PO4, contains K₁₁ = 7.5 x 10-3, K₂ = 6.2 x 10-8 and K₁3 = 4.2 x 10-13. al a2 a3 x² 0.2x=4.2X10-13 x² = 1.26×10-¹3/- 0.₁126×10/2 x = 0.355x100 HP04² = H30t+ P04² 0.3 0.3-X +x +X X X 3- 04-beg[+0]- (6.459.78 PH= Simp -6

求詳解🙏🙏🙏

(1 point) The manager of a large apartment complex knows from experience that 120 units will be occupied if the rent is 300 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 10 dollar increase in rent. Similarly, one additional unit will be occupied for each 10 dollar decrease in rent. What rent should the manager charge to maximize revenue?

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