SCIN131 AMU Week 5 Reid V. Covert Case Brief Review

Anonymous
timer Asked: Apr 2nd, 2019
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Question Description

Please read the Forum Instruction carefully. Thank U

Here is my Access to https://amu.apus.edu

Student ID: 5562183

Password: Royals1964**

Go to Lesson, Forum in Course.

Class: Introduction to Chemistry with Lab.


Instructions: Your initial post over the material outlined above for Topic should be at least 200 words (these must be words that are typed text within the text box of the Rich Text Editor, thus words on any attached documents will not count towards the total).

To make your posts, click on START A NEW CONVERSATION above:

State your name and Problem Numbers in the title (Title: Jane Doe, Problems 7.43 and 9.39).

In addition to your initial posts to the topics in this Week's Forum, you are required to also reply to at least two classmates' original posts, and each reply must be a minimum of 100 words and include direct questions. Your replies can add additional insight to your classmates’ opinions, suggest other alternative approaches, or anything similar. Be sure to read the follow-up posts to your own posts and reply to everyone who comments on your post.

For this topic, you will select two problems from the Chemistry: Atoms First, OpenStax text (in the link there is a book), one problem from each of the following two problem sets:

For Problem 1: You MUST select a problem from the end of the chapter "Exercises" from Chapter 7: Problems 43-95.

For Problem 2: You MUST select a problem from the end of the chapter "Exercises" from Chapter 9: Problems 39-86.

These problems and their discussions will be included together in one post. After you decide which problems you would like to discuss, start a thread in the Topic Forum. You need not fill in the content—only begin a thread with a subject line that includes your name and the problems you will be discussing. When you are ready to fill in the details of the post, you can simply go back into your post and click “Edit” and put the information into your post. By starting your post, you are claiming your problems and no other student is allowed to choose the same problems.

Notice! The first person to post a thread on the Forum with his/her problems in the subject line will be the only one to receive credit for the assignment should their be duplicate choices. Therefore, you should be sure no one has already chosen the problems you wish to investigate.

You need to:
*show work to find solution (you can use an embedded image or the fx button on the Rich Text Editor if appropriate)
*explain in the text how you approached and worked through the problem

Ideally, you will choose problems that you had a hard time solving until something clicked (which you would then explain--what you figured out that you did wrong, etc.). Either way, you should lead a discussion about the problem. This will help everyone go through the thought process of these problems, see different ways that students set them up, compare approaches, maybe learn new strategies and hints, recognize mistakes, etc. If you cannot solve the problem at first, no worries, your classmates and myself will give you help you along and you can edit your problem until it is due. If you are having trouble, show your work and explain where you are getting stuck. Remember, you are not getting graded on whether you solve the problems correctly, but rather the attempt you make and the discussion you have with us related to it. So it will likely be more beneficial to you to select challenging problems with which you need help as opposed to easy ones that you can already solve.

Initial Post Due: Thursday of Week 5, by 11:55pm ET

Responses Due: Sunday of Week 5, by 11:55pm ET

Unformatted Attachment Preview

Responses to Question Student 1 Chapter 7.74. How many molecules of C2H4Cl2 can be prepared from 15 C2H4 molecules and 8 Cl2 molecules? Since 2 CL atoms are required for every molecule, you could only make 8 complete complete molecules. You would have 7 moles of C2H4 left over. Chapter 9.72. Calculate the enthalpy of combustion of propane, C3H8(g), for the formation of H2O(g) and CO2(g). The enthalpy of formation of propane is −104 kJ/mol. The equation to calculate the enthalpy of formation, you subtract the enlthapy of formation of the reactants from the enthaply of formation of the product. Using appendix G in the book, all of these values can be looked up. DeltaH = C3H8 (-104kj/mol) - (H20 (–241.82) + CO2 (–393.51)) the enthalpy of combustion of propane = -531.33 kj/mol, which means it is an endothermic reaction. Noah Student 2 Good morning class. For this weeks forum discussion we are solving two problems in the textbook again. My first question I chose to solve is: Chapter 7 Problem 64. A sample of 0.53 g of carbon dioxide was obtained by heating 1.31 g of calcium carbonate. What is the percent yield for this reaction? CaCO3(s)→CaO(s)+CO2(s) 1. Convert 1.31g CaCO3 into grams of C02. 2. Multiply that by balanced chemical equation 3. Multiply molar mass of C02 (approximately 44g) divided by 1 mol. 4. Multiplying these equations together creates a theoretical solution of .5764g CO2 . Now I divided the actual by theoretical. .53 divided by .5764 multiplied by 100 to give us our final percent. Percent yield = 91.9% yield. Chapter 9 Problem 46 How much heat is produced by combustion of 125 g of methanol (CH3OH) under standard state conditions? 1. The reaction that is occurring and the H is -726.1 kJ/mol. 2. Multiply equation to get 3.91 mol CH3OH 3. Multiply the mols by how many kJ/mol of heat this reaction puts off 3.91 mol x -726.1 kJ/mol = -2836.3 kJ Final answer is 2836.3kJ I used the fx editor in order to write the equations down in the forum. If anyone attempts to solve these problems let me know if you had received a different solution and lets find out how we came up with a different solution. Donald ...
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Tutor Answer

puritymaruga
School: Cornell University

Atta...

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Anonymous
Excellent job

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