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Zumdahl and Zumdahl - Chemistry 7/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 5/17

Due: Saturday, April 16, 2011 08:00 EDT

About this Assignment

Question
Points
1 2 3 4 5 6 7 8
1 2 0/1 0/1 0/1 2/8 0/1 0/2
Total
5/17

Description

Here are some textbook questions from Chemistry 7/e by Zumdahl and Zumdahl published by Brooks/Cole. Click here for a list of all of the questions coded in WebAssign.


Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.



1. 1/1 points All Submissions Notes Question: ZumChem7 1.E.057.
Question part
Points
Submissions
1
1
1/50
Total
1/1
 
Diamonds are measured in carats, and 1 carat = 0.200 g. The density of diamond is 3.51 g/cm3. What is the volume of 4.50 carat diamond?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
Your answer is correct. cm3
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Chapter 1 Section 8

2. 2/2 points All Submissions Notes Question: ZumChem7 5.E.041.
Question part
Points
Submissions
1 2
1 1
2/50 2/50
Total
2/2
 
A 2.43 L container is filled with 174 g argon.
(a) If the pressure is 10.0 atm, what is the temperature?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
Your answer is correct. K

(b) If the temperature is 225 K, what is the pressure?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
Your answer is correct. atm

Read the eBook
Chapter 5 Section 2

3. –/1 points Notes Question: ZumChem7 6.E.028.
Question part
Points
Submissions
1
0/1
0/50
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0/1
 
As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0 L. What was the initial volume of the system if the internal energy of the system decreased by 103.7 J?
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 L
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Chapter 6 Section 1

4. –/1 points Notes Question: ZumChem7 6.E.051.
Question part
Points
Submissions
1
0/1
0/50
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0/1
 
In a coffee-cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M HCl are mixed to yield the following reaction.
Ag+(aq) + Cl-(aq) AgCl(s)
The two solutions were initially at 22.31°C, and the final temperature is 23.65°C. Calculate the heat that accompanies this reaction in kJ/mol of AgCl formed. Assume that the combined solution has a mass of 100.0 g and has a specific heat capacity of 4.18 J/°C·g.
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 kJ/mol
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Chapter 6 Section 2

5. –/1 points Notes Question: ZumChem7 7.E.043.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
A particle has a velocity that is 90.% of the speed of light. If the wavelength of the particle is 2.6 10-15 m, calculate the mass of the particle.
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 kg
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Chapter 7 Section 2

6. 2/8 points All Submissions Notes Question: ZumChem7 7.E.109.
Question part
Points
Submissions
1 2 3 4 5 6 7 8
1 0/1 0/1 0/1 1 0/1 0/1 0/1
2/50 1/50 2/50 1/50 1/50 0/50 1/50 0/50
Total
2/8
 
Complete and balance the equations for the following reactions. (Type your answer using the format CO2 for CO2. Use the lowest possible coefficients.)
(a)
Answer is not case sensitive.
Your answer is correct.Li(s) +
Answer is not case sensitive.
Your answer is incorrect.N2(g) →
Answer is not case sensitive.
Your answer is incorrect.
Answer is case sensitive.
Your answer is incorrect.

(b)
Answer is not case sensitive.
Your answer is correct.Rb(s) +
Answer is not case sensitive.
S(s) →
Answer is not case sensitive.
Your answer is incorrect.
Answer is case sensitive.

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Chapter 7 Section 13

7. –/1 points Notes Question: ZumChem7 8.E.058.
Question part
Points
Submissions
1
0/1
0/50
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0/1
 
Use bond energies to estimate ΔH for the combustion for seven moles of acetylene.
C2H2(g) + 5/2 O2(g) → 2 CO2(g) + H2O(g)
Enter a number.
 kJ
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Chapter 8 Section 8

8. –/2 points Notes Question: ZumChem7 11.E.032.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
Calculate the molarity and mole fraction of acetone in a 1.20 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the volumes of acetone and ethanol add.
molarity
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 M
mole fraction
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Chapter 11 Section 1
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