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Zumdahl and Zumdahl - Chemistry 6/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 21.6 / 37

Due : Thursday, April 16, 2020 09:00 EDT

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5
–/6 –/4 –/2 –/17 –/8
Total
21.6/37 (58.4%)

  • Instructions

    Here are some textbook questions from Chemistry 6/e by Zumdahl and Zumdahl published by Houghton Mifflin. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and makes the answer key available after the first submission so you can see the correct answers. (Typically, the answer key is posted after the due date!)

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. –/6 points ZumChem6 1.E.036. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6
–/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50
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–/6
 
Perform the following unit conversions.
(a) 921 oz to kilograms
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26.1

 kg
(b) 12.8 L to gallons
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3.38

 gal
(c) 115 mL to quarts
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0.122

 quart
(d) 2.89 gal to milliliters
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10900

 mL
(e) 4.18 lb to grams
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1.90e+03

 g
(f) 550 mL to quarts
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0.58

 quart
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2. –/4 points ZumChem6 2.E.066. 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
 
Name each of the following compounds.
(a)
(No Response) seenKey

dinitrogen tetroxide
(b) PF3
(No Response) seenKey

phosphorus trifluoride
(c) PI3
(No Response) seenKey

phosphorus triiodide
(d) N2O4
(No Response) seenKey

dinitrogen tetroxide
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3. –/2 points ZumChem6 3.E.030. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
Total
–/2
 
A diamond contains 6.0 ✕ 1021 atoms of carbon. How many moles of carbon are in this diamond?
WebAssign will check your answer for the correct number of significant figures.(No Response) seenKey

0.010

 mol
How many grams of carbon are in this diamond?
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0.12

 g
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4. –/17 points ZumChem6 4.E.066. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
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Total
–/17
 
Balance the following oxidation-reduction reactions that occur in basic solution. (Use the lowest possible coefficients.)
(a) (No Response) seenKey

4

 H2O(l) + (No Response) seenKey

1

 Cr(s) + (No Response) seenKey

1

 CrO42-(aq) (No Response) seenKey

2

 Cr(OH)3(s) + (No Response) seenKey

2

 OH -(aq)
(b) (No Response) seenKey

8

 H2O(l) + (No Response) seenKey

7

 S2-(aq) + (No Response) seenKey

2

 MnO4-(aq) (No Response) seenKey

5

 S(s) + (No Response) seenKey

2

 MnS(s) + (No Response) seenKey

16

 OH -(aq)
(c) (No Response) seenKey

1

 H2O(l) + (No Response) seenKey

3

 CN-(aq) + (No Response) seenKey

2

 MnO4-(aq) (No Response) seenKey

3

 CNO-(aq) + (No Response) seenKey

2

 MnO2(s) + (No Response) seenKey

2

 OH -(aq)
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5. –/8 points ZumChem6 5.E.029. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
–/8
 
A diagram for an open-tube manometer is shown below. If the flask is open to the atmosphere, the mercury levels are equal.

Now assume a gas is contained in the flask.

(a) Calculate the pressure in the flask in torr, atmosphere, and pascals if ha = 130. mm.
WebAssign will check your answer for the correct number of significant figures.(No Response) seenKey

630.

 torr
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0.829

 atm
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8.40e+04

 pascals
(b) Calculate the pressure in the flask in torr, atmosphere, and pascals if hb = 230. mm.
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990.

 torr
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1.30

 atm
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1.32e+05

 pascals
(c) Calculate the pressures in the flask in parts a and b (in torr) if the atmospheric pressure were instead 700. torr.
case (a)
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570.

 torr
case (b)
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930.

 torr
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