EDTA滴定，求解🙏

2. Titration of Ca2+ and Mg2+ in a 50.00-ml sample of hard water required 23.65 mL of 0.01205 M EDTA (C10H16N203). Calculate the hardness of the water sample, expressed as ppm CaCO3 Element Ca Mg C H N o Atomic Mass (g/mol) 40.08| 24.31|12.01|1.008| 14.01|16.00

請問第17題

第 16 至20 題為題組 The fruits and vegetables we eat often come in distinctive colors. The rich colors, 16 are not there only to attract attention. They perform another important function for the plants. Research shows that the substances 17 these colors actually protect plants from chemical damage. The colors come mainly from chemicals known as antioxidants. Plants make antioxidants to protect themselves from the sun's ultraviolet (UV) light, 18 may cause harmful elements to form within the plant cells. When we eat colorful fruits and vegetables, the coloring chemicals protect us, too. Typically, an intensely colored plant has 19 of these protective chemicals than a paler one does. Research on how chemicals in blueberries affect brain function even suggests that these chemicals may help our own brains work more 20 In other words, eating richly colored fruits and vegetables makes us both healthier and smarter. 16. (A) almost (B) rarely (C) however (D) relatively 17. (A) capable of (B) different from (C) inferior to (D) responsible for

要問第1和6題，這樣寫可以嗎？ 只會一題也沒關係 答案是第二張圖

全民英檢(初級】寫作測驗 GEPT Elementary Writing 練習: 句子改写 1. Most of my coworkers are kind to me, but Linda isn't kind to me. (LY Except 改寫) . Except Linda, most of my coworkers are kind to me 2. We all did well on our final exams and Adam did well on the final exams, too. (L) Besides ) Besides Adom, we all did well on our final examy, 3. Would you like to see some cute animals in the zoo? (1) how aboutis) How about heel some cute animals in the zoo! 4. The man who had long hair robbed two housewives at the market. ( 部分以with 改寫) ) The man with long hair robhed two housewives at the market. 5. Uncle Kevin always visits us and brings gifts for us. (LX, never... without... 改寫) Uncle kevin never with un and without brings gultater 句子合併。 6. Allen has been to many countries. He hasn't been to China. D except for 合併) ) Except for china, Allen has been to many countries many 112

請問為什麼第一題不能選D 詳解只跟我講後面要加where但沒跟我講為什麼要加逗號🥲

V、生活與流行 Chen Shu-chu, an ordinary vegetable seller, has been praised by Time Magazine 2 was listed as one of the 100 most influential people in the world for 2010. 动師? Ms. Chen so special is that she made a modest living, yet she has still managed to save she could. Ms. Chen had a difficult childhood. Her mother died when she graduated from elementary school. She did not continue to 4. junior high school. Instead, she decided to work and help her father raise the family. 5. she turned 13, she had taken over her mother's vegetable stand Since then, she has been selling vegetables at Central Market in Taitung County. Every morning she gets up at 3 o'clock, 6. to Central Market to sell vegetables there. It is her great influence she has had on those in need that 7. the recognition by Time Magazine. CROSS 91 W, which (B) which (C), where (D) where

13.求解🙏🙏🙏

Na d. lowest freezing point: N2, CO, or CO2 102 +02 13. When 2.00 moles of SO2(g) reacts completely with 1.00 mole of O2(g) to form 2.00 moles of SO3(g) at 25°C and a constant pressure of 1.00 atm, 198 kJ of energy is released as heat. Calculate AH and AE for this process.com 14. Prediction of molecular structure PC1s. ce ce #batum 15. Calculate AH for the synthesis of diborane (B2H6) from its elements, according to the equation

求救 統計#9 （可支薪）

9.A society PAWT is primarily concerned with the amount of TV viewed by todays youth. It asked 300 parents of elementary school aged children to estimate the number of hours their child spent watching television in any given week. The mean and the standard deviation for their responses were 17 and 3, respectively. PAWT then constructed a stem-and-leaf display for the data, which showed that the distribution of the number of hours was a symmetric, mound-shaped distribution. Identify the interval where you believe appropriately 95% of the television viewing fell in the distribution.

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?

8.求解🙏🙏🙏

8 Of the following elements, which is the least common in living organisms? A) sodium B) oxygen A C) hydrogen D) nitrogen E) carbon

跪求解答，萬分感謝

The basic elements ofa sentence include subject (S$), verb (V), direct object (DO), indirect object (IO), subject complement (SC), object complement (OC) and adverbial (A). Identify the elements in the underlined parts- Where a person was a drug dependent person, (a) the Director may consider (b) him (c) aftperson if such person (d) satisfles (e) the Director that he has not been (f) adrug dependent person (g) continuously in the 7 years immediately prior to the day on which (h) the Director (D considers 0) the matter Source: rug Depezdezi/ Pe7sozs 7edzre7l/ ed2777/27797 Cezey 丰7cezszgg0 Orediudgce (Cap. 566)

只有氧是不規則的命名嗎？ Tetroxide vs tetraoxide Pentoxide vs pentaoxide PCl5 後面Cl 就是 pentachloride

6 机 BLE 2.6 | Prefixes Used to Indicate Number im Chemical Names U選4 7)o7o- g- 7二 Numberindicated 1 7efrg- 2e77o- Agexog- 7epfg- Ocfg- 7o7g- 選和os和 eu |,, decg- INTERACTIVE EXAMPLE 2.8 SOLUTION JPHABnEB 呈_Atomsg, Miolecules, and Ins consider the names ot the s will no To see how these Tules apply, 沿 同 lent compounds formed by nitrfgg 時 as tematic Name 了 同 loxi Nitrous oX1ce de 。 imitrogen InonoX1 1 9 ii monoxide NI 時 4 NO Nitrogen N os Dinitrogen TioX1 同 Noo, Dinitrogen tetIOX1 Noo Dinitrogen pentoxi 2 avoid awkward pron that to hen the element beglns Wtt 7oO/ dinitrogen tetrdox ng examples fthe prefiX trogen tetroxide, tt their common names- esystematic names to Notice from the precedi often drop the final ? % 20 example, N204 1S called dinlt called carbon monoxide, 7 carbo Some compounds are always Te are water, ammonia, and hydrogen pe H2O2 are never used. n monoox1l ferred to by roxide- Th Naming Type 山 Binary Compounds 1. Name each of the following compounds: a. ,PCD DBGIG MS 09 2. From the following systematic nameS, Write the formula for ea a.。 Sulfur hexafluoride b. Sulfur trioxide c.。 Carbon dioxide 1 Formula Name a. PCl Phosphorus pentdehloride Be Phosphorus trichloride c. SO2 Sulfur dioxide 2. Name Formula a.。 Sulfur hexafluoride SFe b.。 Sulfur trioxide SO ce. Carbon dioxide CO