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Chang - General Chemistry: Essential Concepts 5/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 13 / 13

Due : Thursday, September 5, 2019 07:00 EDT

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5 6
–/3 –/5 –/1 –/1 –/2 –/1
Total
13/13 (100.0%)

  • Instructions

    General Chemistry: The Essential Concepts 5/e by Raymond Chang published by McGraw-Hill Higher Education now has animations with conceptual questions and tutorial problems offering feedback and hints to guide student content mastery, as well as over 1150 end-of-chapter questions. You can check out a sampling of this exciting development below.

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    Click here for a list of all of the questions coded in WebAssign.

    Question 1 is an algorithmic end-of-chapter problem with conditional feedback added to the numerical answers.

    Question 2 is an animation with an assignable quiz attached.

    Question 3, 4, and 5 are follow-up Practice Exercises which check student understanding of the related Example in the textbook. 3.PracticeEx.01, for example, is directly related to Exercise 3.1.

    Question 6 is an end-of-chapter problem which has been converted into a multple choice format. This demo assignment allows many submissions and allows you to try another version of the same question for practice.

Assignment Submission

For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

Your last submission is used for your score.

1. –/3 points ChangE5 1.EOCP.029. My Notes
Question Part
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1 2 3
–/1 –/1 –/1
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–/3
 
Carry out these operations as if they were calculations of experimental results, and express each answer in the correct units and with the correct number of significant figures.
(a) 5.6805 m + 0.6 m + 4.25 m
WebAssign will check your answer for the correct number of significant figures.(No Response) m

(b) 3.75 g - 2.9125 g
WebAssign will check your answer for the correct number of significant figures.(No Response) g

(c) 4.58 cm ✕ 3.6660 cm
WebAssign will check your answer for the correct number of significant figures.(No Response) cm2
Your work in question(s) will also be submitted or saved.
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2. –/5 points ChangE5 2.Animation.01. My Notes
Question Part
Points
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1 2 3 4 5
–/1 –/1 –/1 –/1 –/1
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–/5
 
Charge to Mass Ratio of the Electron Use the animation to answer the following questions.
(a) The cathode ray tube used by Thomson:
    

(b) Inside the cathode ray tube the:
    

(c) When an electric field is applied, the ray is attracted to the:
    

(d) When the magnet is placed near the tube with the north pole pointing upward, the ray is:
    

(e) In the equation used to calculate the mass to charge ratio of the electron which of the following variables is not needed?
    
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3. –/1 points ChangE5 3.PracticeEx.01. My Notes
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–/1
 
Practice Exercise 3.1 about this problem
The atomic masses of the two stable isotopes of chlorine, 3517Cl (75.78 percent) and 3717Cl (24.22 percent), are 34.9689 amu and 36.9659 amu, respectively. Calculate the average atomic mass of chlorine.
WebAssign will check your answer for the correct number of significant figures.(No Response) amu
HINTS
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4. –/1 points ChangE5 3.PracticeEx.06. My Notes
Question Part
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Submissions Used
1
–/1
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–/1
 
Practice Exercise 3.6 about this problem
Calculate the number of moles of chloroform (CHCl3) in 237 g of chloroform.
WebAssign will check your answer for the correct number of significant figures.(No Response) moles
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5. –/2 points ChangE5 3.PracticeEx.16. My Notes
Question Part
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1 2
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–/2
 
Practice Exercise 3.16 about this problem
Industrially, vanadium metal, which is used in steel alloys, can be obtained by reacting vanadium(V) oxide with calcium at high temperatures.

5 Ca + V2O5 5 CaO + 2 V

In one process 1.45 ✕ 103 g of V2O5 react with 2.06 ✕ 103 g of Ca.
(a) Calculate the theoretical yield of V.
WebAssign will check your answer for the correct number of significant figures.(No Response) g
(b) Calculate the percent yield if 803 g of V are obtained.
WebAssign will check your answer for the correct number of significant figures.(No Response) %
HINTS
Getting Started
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6. –/1 points ChangE5 4.TB.041. My Notes
Question Part
Points
Submissions Used
1
–/1
0/50
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–/1
 
Which one of the following is a redox reaction?
    
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