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Shultz - Chemistry for Engineers (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 6 / 22

Due : Sunday, January 12, 2020 08:00 EST

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5
–/4 –/5 –/4 –/5 –/4
Total
6/22 (27.3%)

  • Instructions

    Here are some textbook questions from Chemistry for Engineers 7/e by Mary Jane Shultz published by Brooks/Cole. Click here for a list of all of the questions coded in WebAssign. 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. –/4 points ShultzCE07 1.E.096. My Notes
Question Part
Points
Submissions Used
1 2 3 4
–/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50
Total
–/4
 
The mass of a 300. mL beaker is 188 g when empty. Determine its mass when filled with the following substances.
(a) water (density 0.9970 g/cm3 at 20°C)
WebAssign will check your answer for the correct number of significant figures.(No Response) g
(b) alcohol (density 0.7893 g/cm3 at 20°C)
WebAssign will check your answer for the correct number of significant figures.(No Response) g
(c) mercury (density 13.546 g/cm3 at 20°C)
WebAssign will check your answer for the correct number of significant figures.(No Response) g
(d) Explain why mercury-containing pollutants are usually found in the mud at the bottom of a lake of stream.
    
Your work in question(s) will also be submitted or saved.
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2. –/5 points ShultzCE07 2.E.092. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5
–/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50
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–/5
 
Calculate the effective nuclear charges for these five elements: Cu, Al, Fe, K, Ti.
Cu
(No Response)
Al
(No Response)
Fe
(No Response)
K
(No Response)
Ti
(No Response)
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
3. –/4 points ShultzCE07 3.E.028. My Notes
Question Part
Points
Submissions Used
1 2 3 4
–/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50
Total
–/4
 
Predict the molecular formula for the compound formed from the following pairs of elements. (Type your answer using the format CO2 for CO2.)
(a) Mg and O
(No Response)
(b) Br and Cl
(No Response)
(c) Al and O
(No Response)
(d) H and F
(No Response)
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
4. –/5 points ShultzCE07 6.E.046. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5
–/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50
Total
–/5
 
Caffeine is the stimulant found in coffee, tea, and many soft drinks. The structure of caffeine is shown here. Identify all sp2 hybridized atoms in caffeine. (Select all that apply.)

Caffeine


number of ring C atoms
(No Response)
number of ring N atoms
(No Response)
number of non-ring C atoms
(No Response)
number of O atoms
(No Response)
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5. –/4 points ShultzCE07 7.E.022. My Notes
Question Part
Points
Submissions Used
1 2 3 4
–/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50
Total
–/4
 
Determine which fuel, methane or propane, produces more heat per gram.
    

methane
(No Response) kJ/g
propane
(No Response) kJ/g
Explain why.
(No Response)

This answer has not been graded yet.

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