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Hosmane - General Chemistry 1e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 16 / 38

Due : Thursday, October 10, 2019 08:30 EDT

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5 6 7 8 9 10
–/1 –/2 –/3 –/2 –/1 –/2 –/18 –/3 –/1 –/5
Total
16/38 (42.1%)

  • Instructions

    General Chemistry, 1st edition, written by Narayan Hosmane and published by Cognella Academic Publishing, raises students' awareness of how chemistry permeates life on every level. It moves the study of chemistry past the purely scientific and abstract to make it relatable and relevant. The WebAssign content for this title contains a number of features and resources for students.

    Question 1 enforces significant figures grading for a numerical answer.

    Question 2 utilizes chemPad to grade chemical formulas.

    Question 3 exhibits numerical grading without significant figures grading.

    Question 4 highlights fill-in-the-blank answer blanks for chemical names.

    Question 5 uses chemPad to allow students to enter balanced chemical reactions.

    Question 6 illustrates the use of chemPad for entering ions with charges as well as lists.

    Question 7 demonstrates an energy level diagram of a many-electron atom using Multiple-Choice pulldown answer blanks.

    Question 8 makes use of chemPad for entering electron configurations.

    Question 9 allows students to draw chemical structures using Marvin JS.

    Question 10 demonstrates the capability of drawing reactions with Marvin JS. This demo assignment allows many submissions and allows you to try another version of the same question for practice wherever the problem has randomized values.

    The answer key and solutions will display after the first submission for demonstration purposes. Instructors can configure these to display after the due date or after a specified number of submissions.

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. –/1 points HosGenChem1 1.4.WA.004. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
Total
–/1
 
A bottle of sodium hydroxide (NaOH) was found to contain 1.32 lb of this chemical. Express the amount of sodium hydroxide in kilograms. (Given: 1 lb = 453.59237 g exactly.)
WebAssign will check your answer for the correct number of significant figures.(No Response) kg

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2. –/2 points HosGenChem1 2.11.WA.004. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
Total
–/2
 
Write the molecular and empirical formulas for the compound with the following structural formula.

molecular formula:

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empirical formula:

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3. –/3 points HosGenChem1 2.4.WA.001. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/100 0/100 0/100
Total
–/3
 
Consider the atom represented by 4119K.
(a) What is the atomic number of this atom?
(No Response)

(b) What is the mass number of this atom?
(No Response)

(c) How many neutrons are in this atom?
(No Response)

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4. –/2 points HosGenChem1 2.9.WA.005. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
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–/2
 
Write the names of the following compounds.
(a)    Fe(C2H3O2)3 (an ionic compound)
(No Response)

(b)    PF5 (a covalent compound)
(No Response)

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5. –/1 points HosGenChem1 3.3.WA.003. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
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–/1
 
Rewrite the equation below using the correct conventions for stoichiometric coefficients.
2 SrBr2 + 2 H2SO4 → 2 SrSO4 + 4 HBr

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6. –/2 points HosGenChem1 3.CM.WA.005. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
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–/2
 
(a) Determine which (if any) of the following three salts is soluble in water: AgCl, K3PO4, Ba(C2H3O2)2. (Separate substances in a list with a comma. Enter NONE in any unused answer blanks.)

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(b) A student is given a salt solution and needs to determine the cation of the salt by qualitative analysis. When dilute HCl is added to the solution, no precipitate is formed. However, when H2S is passed through the acidic solution, a precipitate is observed. Is the cation of the salt most likely to be Pb2+, Sb3+, or Fe3+?

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7. –/18 points HosGenChem1 8.6.WA.001. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100
Total
–/18
 
Determine the energy level diagram for the orbitals of potassium, a many-electron atom. (Complete each energy level from left to right. Enter __ for an unoccupied orbital, ↑_ for a singly occupied orbital, and ↑↓ for a doubly occupied orbital.)
energy increases along the vertical axis     (No Response)
4pz 		(No Response)
4px 		(No Response)
4py 		                       
          (No Response)
3dz2 		(No Response)
3dxz 		(No Response)
3dyz 		(No Response)
3dxy 		(No Response)
3dx2-y2 		             
  (No Response)
4s 		                             
    (No Response)
3pz 		(No Response)
3px 		(No Response)
3py 		                       
  (No Response)
3s 		                             
                                 
                                 
    (No Response)
2pz 		(No Response)
2px 		(No Response)
2py 		                       
  (No Response)
2s 		                             
                                 
                                 
                                 
  (No Response)
1s 		                             

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8. –/3 points HosGenChem1 8.CM.WA.011. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/100 0/100 0/100
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–/3
 
Write the condensed electron configurations for atoms of the following elements, using abbreviations for noble-gas cores: barium (Ba), technetium (Tc), and sulfur (S).
(a) barium (Ba)

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(b) technetium (Tc)

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(c) sulfur (S)

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9. –/1 points HosGenChem1 9.4.WA.014. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
Total
–/1
 
What is the Lewis structure of the polyatomic anion IBr32−? (Assign lone pairs, radical electrons, and atomic charges where appropriate.)(No Response)

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10. –/5 points HosGenChem1 22.CM.WA.008. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5
–/1 –/1 –/1 –/1 –/1
0/100 0/100 0/100 0/100 0/100
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–/5
 
(a) Would benzene undergo addition reactions more readily than an alkene with six carbon atoms such as 2-hexene? Explain your answer.
The π electrons of benzene are (No Response) due to their delocalization in the π orbitals of the ring. Therefore, benzene participates in addition reactions (No Response) readily than an alkene with six carbon atoms. Conversely, benzene (No Response) readily undergoes substitution reactions.

(b) Benzene undergoes a Friedel-Crafts reaction with chloromethane in the presence of AlCl3. Write the balanced equation for this reaction. Name the organic product. (Show all hydrogen atoms that are not attached to a carbon atom.)
balanced reaction equation:
(No Response)
product name:
(No Response)

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