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Holt - Davis et al - Modern Chemistry 1/e (Homework)

James Finch

Chemistry - HS, section 1st period, Fall 2010

Instructor: Dr. Friendly

Current Score: 1/27

Due: Monday, August 30, 2010 18:00 EDT

About this Assignment

Question
Points
1 2 3 4 5
0/4 0/1 0/12 1/3 0/7
Total
1/27

Description

Here are some textbook questions from Modern Chemistry by Davis and Metcalfe published by Holt, Rinehart and Winston. Click here for a list of all of the questions coded in WebAssign.




1. 0/4 points All Submissions Notes Question: DMWC1 12.RC.008.
Question part
Points
Submissions
1 2 3 4
0/1 0/1 0/1 0/1
0/50 1/50 0/50 0/50
Total
0/4
 
Using Figure 12-12, estimate the approximate equilibrium vapor pressure of each of the following at the specified temperature.


Figure 12-12

(a) water at 40°C
Enter a number.
 torr
(b) water at 80°C
Enter a number.
Your answer is incorrect. torr
(c) diethyl ether at 20°C
Enter a number.
 torr
(d) ethanol at 60°C
Enter a number.
 torr


2. 0/1 points All Submissions Notes Question: DMWC1 19.RC.002.
Question part
Points
Submissions
1
0/1
1/50
Total
0/1
 
Which of the following are redox reactions?

Your answer is incorrect.




3. –/12 points Notes Question: DMWC1 5.MR.039.
Question part
Points
Submissions
1 2 3 4 5 6 7 8 9 10 11 12
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
0/12
 
Without looking at the periodic table, identify the period, block, and group in which each of the following elements is located.
(a) [Rn]7s1
period
Enter a number.
block
    


group
Enter a number.
 		(b) [Kr] 4d105s1
period
Enter a number.
block
    


group
Enter a number.
(c) [Ne] 3s23p1
period
Enter a number.
block
    


group
Enter a number.
 		(d) [Ar] 3d104s24p2
period
Enter a number.
block
    


group
Enter a number.


4. 1/3 points All Submissions Notes Question: DMWC1 6.MR.051.
Question part
Points
Submissions
1 2 3
1 0/1 0/1
1/50 1/50 1/50
Total
1/3
 
Determine the geometry of the following molecules.
(a) H2O
    

Your answer is correct.


(b) SiCl3Br
    

Your answer is incorrect.


(c) CCl4
    

Your answer is incorrect.



5. –/7 points Notes Question: DMWC1 9.CR.12.
Question part
Points
Submissions
1 2 3 4 5 6 7
0/1 0/1 0/1 0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
0/7
 
Sulfuric acid reacts with sodium hydroxide according to the following equation.

H2SO4 + NaOH Na2SO4 + H2O

(a) Balance the equation for this reaction.
Answer is not case sensitive.
H2SO4 +
Answer is not case sensitive.
NaOH
Answer is not case sensitive.
Na2SO4 +
Answer is not case sensitive.
H2O
(b) What mass of H2SO4 would be required to react with 0.81 mol of NaOH?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g
(c) What mass of each product is formed by this reaction?
Na2SO4
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g
H2O
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g

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