445_Project_proposals_filled

Please Help me complete part d, e and f of question 4.

Consider the molecules: CH2=CH-CH=CH-CH=CH-CH=CH-CH=CH2. Let’s assume that the 10 electrons that make up the double bonds can exist everywhere along the carbon chains. The electrons can then be considered as particles in a box; the ends of the molecule correspond to the boundaries of the box with a finite or zero potential energy inside. In this “molecular box”, 2 electrons can occupy an energy level. What are quantum states that the electrons from this molecule can occupy in the ground state? Note that the length of a C-C bond is about 1.54A and the length of a C=C bond is 1.34A to allow you to estimate the length of the “molecular box”

Enrico Fermi (1901–1954) was a famous physicist who liked to pose what are now known as Fermi problems, in which several assumptions are made in order to make a seemingly impossible estimate. Probably the most famous example is the estimate of the number of piano tuners in Chicago using the approximate population of the city and assumptions about how many households have pianos, how often pianos need tuning, and how many hours a given tuner works in a year. Another famous example of a Fermi problem is "Caesar's last breath," which estimates that you, right now, are breathing some of the molecules exhaled by Julius Caesar just before he died. The assumptions made are: 1. The gas molecules from Caesar's last breath are now evenly dispersed in the atmosphere. 2. The atmosphere is 50 km thick, has an average temperature of 15 °C, and an average pressure of 0.20 atm. 3. The radius of the Earth is about 6400 km. 4. The volume of a single human breath is roughly 500 mL. Perform the…

In the Millikan oil-drop experiment , the tinyoil drops are observed through the viewing lens as rising,stationary, or falling, as shown here. (a) What causes theirrate of fall to vary from their rate in the absence of an electricfield? (b) Why do some drops move upward?The following exercises are divided into sections that deal with specific topics in the chapter. The exercises are grouped in pairs, with the answers given in the back of the book to the odd-numbered exercises, as indicated by the red exercise numbers. Those exercises whose numbers appear in bracketsare more challenging than the nonbracketed exercises.

The spectroscopic data in the table is generated with five solutions of known concentration. Concentration (M) 0.0133 m= 0.0266 0.0532 0.106 0.213 Absorbance 0.1271 What is the intercept of the linear regression line? 0.08531 0.5388 1.069 Use a spreadsheet program, such as Microsoft Excel, to graph the data points and determine the equation of the best-fit line. 1.954 What is the slope of the linear regression line formed by these points? M-1

4. In addition to finding the right answer can you explain what is Determinate error (I think the correct answer is the 3rd option here but not sure if right)

H20, H2S H9SO4 CrO3, H2SO4 HO, РСС

Which area of Analytical Chemistry do you think is the most applicable as a Medical Technologist?

Hw.62.

hello. I found the question and answer to my question on the site. I need to know how to find the Ka value in the answer. The Ka value is not in my textbook and I can't even find it on google.  Please tell me how to solve this question or you can send me a link to a extensive list of compounds and the ka values     Select from the list below, the Kavalue of aluminium nitrate, Al(NO3)3. (You will have to do a bit of research to answer this question.)   A. 6.2 x 10-8 B. 1.8 x 10-5 C. 7.9 x 10-6 D. 7.5 x 10-3 check_circle Expert Answer thumb_up   thumb_down Step 1 Ka is known as the equilibrium constant of an acid which is defined as the ratio of product of 'concentration of all the product' to the product of 'concentration of all the  reactants'. Step 2 The reaction of Al(NO3)3 with H2O is : Al(NO3)3(aq) + 3H2O(l) --> Al(OH)3(s) + 3HNO3(aq) The standard value of Ka for Al(NO3)3 at 25°C is 1.8 x 10-5. So, The correct option is (B) : 1.8 x 10-5

Fill in the blanks. Since you cannot input superscripts and subscripts directly, please follow this format: e.g. H20 should be written as H>2O; Fe3+ should be written as Fe^3+; Cr,0,2- should be written as Cr>20>7^2- *> to denote subscript, ^to denote superscript *This is just implemented in our class, for canvas to recognize your answers. You must still understand that superscripts and subscripts are the proper way of writing chemical formulas Please take note of the numbers in the answer box. Formula of Formula of Chemical Formula Name of Compound Cation Anion of Compound K+ Cr20,2- Mg2+ CN Ca2+ PO43-

x MyLab and Mastering J Course Home MyLab and Mastering envellum.ecollege.com/course.html?courseld316985674&OpenVellumHMAC=Db6918a05d7d0ddc49a113faa2dba85b0# 10001 I Review | Constants | Periodic Table You may want to reference (Pages 420 - 425) Section 10.4 while completing this problem. Part A A chemical reaction occurring in a cylinder equipped with a moveable piston produces 0.641 mol of a gaseous product. If the cylinder contained 0.240 mol of gas before the reaction and had an initial volume of 2.19 L, what was its volume after the reaction? (Assume that pressure and temperature are constant and that the initial amount of gas completely reacts.) Express the volume to thee significant figures and include the appropriate units. Units Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Provide Feedback Next2 P Pearson Copyright © 2021 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy PolicyI Permissions Contact Us| search 78°F…

Briefly define the phrase “fit-for-purpose” in relation to analytical chemistry.

Please help me solve this answer (this is my last attempt, so it cant be wrong)

Here is ph of the probability of an atom moving with a particular speed, for a sample of helium gas at 16. °C. probability 500 1000 1500 2000 2500 3000 speed (m/s) Use this graph to answer the following questions. Round each of your answers to the nearest m/s. Note: your answers must be within 125 m/s of the exact answers to be graded correct. m What is the most likely speed of a He atom in this sample? S What higher speed is only half as likely as the most likely speed? S m What higher speed is only 10% as likely as the most likely speed? S

Simplify. Write each answer in scie 17) (5.4x 10")는 (7X/0") 19) (6 x 10°(4 x 10-1) 21) (7.68 x 10:)는 (9x/0°)

1:25 A O * N 5GUC I 67%, Show What You Know: Learning... KO> O 8 de 8 A new band sensation is playing a concert and recording it for a live album to be released this summer. The band asks the sound mixer if he can autotune the singer who has a habit of singing slightly lower than the note. What would the mixer need to do to the sound wave? How would it affect the characteristics of the wave? В I |Revisión 田 !!!

Write down the augmented matrix that allows you to solve for the coefficients that balance the equation below. (You do not need to solve the system or balance the equation.) 2CUCO3 + r2H2SO4 3CUSO,+4H20+ æsCO2

Please help

Write the CAPITAL LETTER of the best answer on the space provided. For numbers 1 to 3, determine if the given condition is (A) acidic, (B) basic, (C) neutral. or (D) cannot be determined. 1. pH = pOH 2. [H*] = 1.28 x 106 3. pOH = 4.0

Please help answer this

Use the Internet to research what CuCl, and Cu(SO,) look like. Then, suggest a chemical test you could perform that would allow you to distinguish between hydrochloric and sulfuric acids (HCI and H,(SO,)). Explain the test you would perform and the results you would expect in each case. MacBook Air F4 5 6

Hello sir, I have an exam in English, please be the solution to the text of the keyboard.

The concentration of many colorful solutions can be determined by the amount of light absorbed by the solution. The relationship between absorbance and concentration is a linear relationship known as Beer's law. The data below show the absorbance of a series of solutions of known concentrations of Substance A. Plot these data using Excel and determine the equation of the trendline. Use that equation to determine the concentration (M) of an unknown sample of Substance A. Concentration of Substance A (M) Absorbance (x-axis) (y-axis) 0.050 0.024 0.100 0.052 0.200 0.102 0.400 0.195 Unknown 0.196 Type answer

help me answer this thank you this is analytical chemistry

I need the answer for question 4b

A microwave oven works by generating electromagnetic radiation that can be absorbed by water molecules causing them to rotate faster. The friction of the rotating water molecules is lost to their surroundings, thus heating up the food you place in the microwave oven. A microwave oscillator (thing that makes microwaves) emits radiation at a wavelength of 12.24 cm. What is the minimum time it will take a 800 Watt (i.e. 800 Js4) microwave oven emitting 12.24 cm wavelength photons to heat 100 g of water from 20° to 50° C? The heat capacity of water is 4.18 Jg1 deg1?