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Calculate the energy for n=3 from the equation: ; for the hydrogen atom (z=1)

1. The Balmer equation is ; where RH = 1.0973731534 X107 m and n must be greater than 2.
a. Calculate the wavelength in nanometers for a transition from n=5 according to the Balmer equation.
b. The next series of elements in the periodic table with begin in the 9th row. What wavelength would be observed for a transition from n=9 in the hydrogen atom according to the Balmer equation?
2. Bohr generalized the Balmer equation as follows: ; where ni ˂ nf.
a. What is the wavelength for a transition from n= 5 to n=1?
3. The Bohr equation can be expressed in terms of energy as: ; where RH = 2.1798736 X10-18 J and ni ˂ nf.
a. What is the energy associated with the transition from n=5 to n=1?
b. What energy would be associated with a transition from n=9 to n=6?
4. Calculate the energy for n=3 from the equation: ; for the hydrogen atom (Z=1)
5. Calculate the energy for n=5 from the equation: ; for the Li2+ ion atom (Z=3)
6. Calculate the radius for n=8 from the equation: ; where a0 = 0.5292 Å.
7. Calculate the radius for n=4 from the equation: ; where a0 = 0.5292 Å for the He+ ion where Z=2 and compare to the value for the hydrogen atom where Z=1.

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Chemistry

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1)Pre-Lab Exp 2 Laboratory Experiment 2 Pre-Lab Study the Laboratory Experiment

1)Pre-Lab Exp 2 Laboratory Experiment 2 Pre-Lab Study the Laboratory Experiment 2 Write-Up Download Laboratory Experiment 2 Write-Up and then do the Laboratory Experiment 2 Pre-Lab Download Laboratory Experiment 2 Pre-Lab for this experiment. 2)Laboratory Experiment 2 If you have not already done so then study the Laboratory Experiment 2 Write-Up Download Laboratory Experiment 2 Write-Upand then do the Laboratory Experiment 2 Pre-Lab Download Laboratory Experiment 2 Pre-Labfor this experiment. Collect the necessary data while watching these videos and record the data on the Laboratory Experiment 2 Data Sheet Download Laboratory Experiment 2 Data Sheet. Write up a formal Laboratory Report following the required format a)Determination of an Acid Ionization Constant pt A https://www.youtube.com/watch?v=yDFdpV18WZg b)Determination of an Acid Ionization Constant pt B https://www.youtube.com/watch?v=4zMRylp4KPI 3)Post Lab Analysis Exp 2 When conducting experiments it is important for us to recognize how reliable was the design of the experiment, as well as how reliable is the data that we conducted. On this discussion thread you are to post your analysis of that reliability. Things to consider as you write up your post: The experimental procedure Was the experimental procedure designed appropriately to achieve the experiment objectives? Which part of the experimental procedure do you believe had the highest chance of producing poor data? How could the experimental procedure have been improved to get better results? The experimenter and the data Did the experimenter alter the experimental procedure? and if so do you believe the changes improved or hindered the experiment? What mistakes were made by the experimenter? What changes to the way that the experimenter conducted the experiment do you think would have improved the data that was produced? Was the data that was collected any good? explain why or why not? How many significant figures are appropriate for each measurement and calculation and why is that number appropriate? NOTE: these are just some things for you to consider when writing up your analysis; don’t be limited by this list in your analysis. I want you to take time and think about the experiment and then be thoughtful in your response. If your analysis only contains the above bulleted list you will not necessarily get the maximum score. Also, make sure that what you are producing is an “analysis”; simply copying material from your report (except for any analysis provided in your Conclusion) will not be counted towards a complete assignment. After writing up your analysis and posting it here, you need to then read the posts made by other students, and then reply to at least one other post on this thread.

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Chemistry

1)Pre-Lab Laboratory Experiment 1 Download and Study the Laboratory Experiment 1

1)Pre-Lab Laboratory Experiment 1 Download and Study the Laboratory Experiment 1 Write-Up attached and then work on the Laboratory Experiment 1 Pre-Lab attached for this experiment. All grades are to a large extent (50% for Pre-Labs) based upon your work being thorough, complete and of good quality; you need to be showing me all of the relevant work in getting to the questions answers. Good work includes showing all of the units throughout every calculation. Being too brief is the equivalent of being incomplete. 2) Laboratory Experiment 1- If you have not already done so then study the Laboratory Experiment 1 Write-Up and then do the Laboratory Experiment 2 Pre-Lab. Collect the necessary data while watching the short videos A, B, C and D – below are the video links =>Chemical Equilibrium pt A- https://www.youtube.com/watch?v=JE2HFJ3Z7T0 =>Chemical Equilibrium pt B- https://www.youtube.com/watch?v=9lQurTJnoJg =>Chemical Equilibrium pt C- https://www.youtube.com/watch?v=t7ulRA1D-BM =>Chemical Equilibrium pt D- https://www.youtube.com/watch?v=W89qQyFtnHY Record the data on the Laboratory Experiment 1 Data Sheet attached. Write up a formal Laboratory Report following the required format attached Most missed points are due to not explaining the experiment in the Discussion (look in your textbook and the lab experiment “write up” to see examples of how the principles of the experiment are explained). All grades are to a large extent based upon being thorough and complete; 3)Post Lab Analysis Exp 1- When conducting experiments it is important for us to recognize how reliable was the design of the experiment, as well as how reliable is the data that we conducted. On this discussion thread you are to post your analysis of that reliability. Things to consider as you write up your post: The experimental procedure Was the experimental procedure designed appropriately to achieve the experiment objectives? Which part of the experimental procedure do you believe had the highest chance of producing poor data? How could the experimental procedure have been improved to get better results? The experimenter and the data Did the experimenter alter the experimental procedure? and if so do you believe the changes improved or hindered the experiment? What mistakes were made by the experimenter? What changes to the way that the experimenter conducted the experiment do you think would have improved the data that was produced? Was the data that was collected any good? explain why or why not? How many significant figures are appropriate for each measurement and calculation and why is that number appropriate? NOTE: these are just some things for you to consider when writing up your analysis; don’t be limited by this list in your analysis. I want you to take time and think about the experiment and then be thoughtful in your response. If your analysis only contains the above bulleted list you will not necessarily get the maximum score. Also, make sure that what you are producing is an “analysis”; simply copying material from your report (except for any analysis provided in your Conclusion) will not be counted towards a complete assignment.

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Chemistry

Please answer all questions and show work. I will attach the virtual investigati

Please answer all questions and show work. I will attach the virtual investigation for Q1-6 in video format. Please COMPLETE BY 3:30 PM MST.

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Chemistry

i need this done within the instructions that you can see as (instructions/guide

i need this done within the instructions that you can see as (instructions/guidelines) and please follow exactly what *IMG-4002 (1).jpg* says. and I’m an international student so please use simple English. and don’t forget to do the percent difference in the lab report. and re-write all the calculations from the carbon copies to WORD.

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Chemistry

Please follow the rubric and the guidelines for this paper It’s need to include

Please follow the rubric and the guidelines for this paper
It’s need to include Annotated bibliography I will provide you a guideline also it should include at least 1 peer reviewed source that you should use also for the form lab report
I will provide you also my classmate postLab for this experiment JUST USE THE DATA FORM HIS WORK!
MASS/ TLC /MELTING POINT other than that will count as plagiarism.
The most important thing that I want you to focus on is the DISCUSSION AND RESULTS

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Chemistry

By now, you studied Chapters 13 and 14 in your textbook that describe acid-base

By now, you studied Chapters 13 and 14 in your textbook that describe acid-base reactions and used Labster simulation on how to perform and analyze data in titration experiment. It is time to share what you have learned! The goal of this Signature Assignment is to show that you can compute properties of solutions and analyze and interpret data. You will create a PowerPoint presentation that shows the process of going through an acid/base titration like you would if you were in a physical lab. Background Info: Your lab assignment presentation involves putting together a PowerPoint presentation to show other students how to perform titration. In other words, your presentation can be used to show other students (next term) how they can perform a titration by following your instructions and calculations. To do this presentation (minimum 6 slides, in PowerPoint format), we are providing you with an acid, acetic acid (HC2H3O2) and the base (NaOH), and you will use phenolphthalein as an indicator. You will create a mock titration experiment and use given hypothetical data (volume of vinegar, Molarity of NaOH and volume of NaOH for three trials) to solve the titration calculations (consult your instructor if you need further clarification). At the end of your presentation, you will calculate (1) the unknown concentration of the acetic acid (Molarity) and (2) the % mass/vol of the Vinegar solution. Here is a video that illustrates the titration process and necessary calculations: Titration Experiment & Calculate the Molarity of Acetic Acid in Vinegar (Links to an external site.) Here is the hypothetical experimental data that was obtained after your hypothetical titration. Use the data provided for your calculations. Your instructor will provide the data for steps 1 and 2. Students must complete Steps 3-10 for their presentation results. Concentration of NaOH (from the bottle) _____________ Volume of vinegar used (that you poured in the flask) _____________ STEP Trial 1 Trial 2 Trial 3 (1) Initial NaOH level in buret (2) Final NaOH level in buret (3) Volume (mL) of NaOH used Your presentation must consist of more than merely a series of bullet points to earn full credit Remember, you want to teach your peers how to do titration experiment and calculations. Your experiment should be reproduced with ease. Use the Notes section for each slide to fully explain your answers, if necessary. TurnItIn will be used, so paraphrase where necessary to avoid plagiarizing. Grading: See rubric for specific grading criteria (in My Grades). You will be graded based on the rubric; therefore, carefully read it before you start creating your assignment. Remember it is 100 points, so your work must show quality and effort. To include in your PPT presentation: Part 1 Title page Purpose of a titration, what is titration and why do we perform a titration? Include your thoughts on why understanding acid/base titration is important to your future career, and how you will use this concept as you complete your degree (at least 5 sentences with examples). Note: this section is worth 20 points and should provide insightful discussion). Instrumentation – what are the instruments, glassware used when performing a titration. Chemicals and Procedures. What chemicals are needed? List and explain the procedures for this experiment. Observations and expectations – List the observations and write your expectations. This might include color change and when the equivalence point (endpoint) might be reached. Part 2 Calculations and Results. Show all your step-by-step calculations and write your results for the Molarity of the acetic and the % of the acetic acid. Your results must include the following step-by-step calculations: STEP Description Students must do (4) Average volume of NaOH used (mL) Provide calculations (5) Average volume of NaOH used (L) Provide calculations (6) Moles of NaOH used in titration Provide calculations (7) Moles of HC2H3O2 neutralized by NaOH Provide calculations (8) Molarity of HC2H3O2 Provide calculations (9) Grams of HC2H3O2 Provide calculations (10) Percent (m/v) of HC2H3O2 in vinegar Provide calculations HINT: Remember sig figs in calculations to properly express your final answers (molarity and % mass): addition/subtraction -> fewest decimals multiplication/division -> fewest sig figs Provide a reference page (in proper APA format) For help and videos: Your instructor will provide guidance and examples for complete titration calculations. Review supplemental videos: This assignment should be in current APA Style with both a title slide and a reference list that includes all the sources used. At least two scholarly sources should be used (your textbook can be one of the sources). For proper referencing of your resources consult Library on Canvas, APA 7th Edition Guide. NO plagiarism THIS was an guide for the assignment that was given if it help Notes and calculation guide on week 8 signature assignment: I hope you had a chance to look at the instructions and start working on the Week 8 Signature Assignment. There are some items I wanted to share with you: 1. Watch all YouTube videos that are provided, review Chapters 13 and 14 2. Here is the potential PPT simple template: Template for Week 8 Sig Assignment Download Template for Week 8 Sig Assignment. It is just a template, and you must annotate and modify it to make it your own 3. Here is the calculation guide that you might find helpful: Calculations for Week 8 Signature Assignment Download Calculations for Week 8 Signature Assignment. 4. When you prepare your presentation (only PPT slides, no Panopto video), remember that you are teaching me the concept of titration, and my knowledge is limited. I need to see your understanding and clear explanations. 5. Review the instructions that I posted last week. However, here they are again: Summer 2022 Sig Assignment in Word Download Summer 2022 Sig Assignment in Word