Atkins and Jones - Chemical Principles 4/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 5/16

Due: Sunday, August 8, 2010 08:00 EDT

Question

Points

1	2	3	4	5	6
0/2	1/7	0/1	1	2	1/3

Total

5/16

Description

Here are some textbook questions from Chemical Principles: The Quest for Insight 4/e by Peter Atkins and Loretta Jones published by W. H. Freeman. 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. 0/2 points All Submissions Notes Question: AtJon4 1.E.028.

Question part

Points

Submissions

1	2
0/1	0/1
5/50	2/50

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0/2

The Humphreys series is set of spectral lines in the emission spectrum of atomic hydrogen that ends in the fifth excited state. If an atom emits a photon of radiation of wavelength 5913 nm, to which spectral line in the Humphreys series does that photon correspond (i.e., the lowest-energy spectral line, the second-lowest-energy spectral line, the third-lowest-energy spectral line, etc.)?

Justify your answer with a calculation.

WebAssign will check your answer for the correct number of significant figures.

s^-1

2. 1/7 points All Submissions Notes Question: AtJon4 10.E.053.

Question part

Points

Submissions

1	2	3	4	5	6	7
0/1	0/1	0/1	0/1	0/1	0/1	1
0/50	0/50	0/50	0/50	0/50	0/50	1/50

Total

1/7

Calculate the pH and pOH of each of the following aqueous solutions. Refer to table 1 and table 2.

(a) 0.18 M CH₃COOH(aq)
pH

pOH

(b) 0.18 M CCl₃COOH(aq)
pH

pOH

(d) Explain any differences in pH on the basis of molecular structure.

3. 0/1 points All Submissions Notes Question: AtJon4 18.E.056.

Question part

Points

Submissions

1
0/1
5/50

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0/1

What reasons are there for using ethanol as a part of gasoline mixtures? (Select all that apply.)

It can be produced from basic plant fermentations. It is very efficient as a fuel by energy invested from plant to production. It is expensive to produce. It is a renewable resource.

Your answer is incorrect.

4. 1/1 points All Submissions Notes Question: AtJon4 2.E.058.

Question part

Points

Submissions

1
1
8/50

Total

1/1

Which of the following species are radicals? (Select all that apply.)

COCl₂ NO BrO Cl₂O

Your answer is correct.

5. 2/2 points All Submissions Notes Question: AtJon4 3.E.024.

Question part

Points

Submissions

1	2
1	1
5/50	1/50

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2/2

There are three different difluoroethenes, C₂H₂F₂, which differ in the locations of the fluorine atoms.

6. 1/3 points All Submissions Notes Question: AtJon4 3.E.062.

Question part

Points

Submissions

1	2	3
0/1	0/1	1
0/50	0/50	1/50

Total

1/3

Determine the bond orders of the following pair.
O₂⁺

O₂

Use the bond orders to predict which species has the stronger bond.

O₂⁺ O₂

Your answer is correct.

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Atkins and Jones - Chemical Principles 4/e (Homework)

Current Score: 5/16