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Ebbing and Gammon - General Chemistry 8/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 2/13

Due: Thursday, September 9, 2010 08:00 EDT

About this Assignment

Question
Points
1 2 3 4 5
0/4 0/3 0/1 0/3 2
Total
2/13

Description

Here are some textbook questions from General Chemistry 8/e by Ebbing and Gammon 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. 0/4 points All Submissions Notes Question: EbGam8 3.PP.022.
Question part
Points
Submissions
1 2 3 4
0/1 0/1 0/1 0/1
1/50 1/50 1/50 1/50
Total
0/4
 
Find the formula weights of the following substances to three significant figures.
(a) acetic acid, HC2H3O2
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 incorrect. amu
(b) phosphorus pentachloride, PCl5
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 incorrect. amu
(c) potassium sulfate, K2SO4
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 incorrect. amu
(d) calcium hydroxide, Ca(OH)2
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 incorrect. amu


2. –/3 points Notes Question: EbGam8 3.PP.087.
Question part
Points
Submissions
1 2 3
0/1 0/1 0/1
0/50 0/50 0/50
Total
0/3
 
Methanol, CH3OH, is prepared industrially from the gas-phase catalytic reaction that has been depicted here using molecular models.

In a laboratory test, a reaction vessel was filled with 33.5 g CO and 11.7 g H2.
How many grams of methanol would be produced in a complete reaction?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g
Which reactant remains unconsumed at the end of the reaction?
    


How many grams of it remain?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g


3. –/1 points Notes Question: EbGam8 5.PP.031.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
A gas in a closed-tube manometer (Figure 5.4) has a measured pressure of 0.051 atm. Calculate the pressure in mmHg.
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 mmHg


Figure 5.4



4. –/3 points Notes Question: EbGam8 9.PP.049.
Question part
Points
Submissions
1 2 3
0/1 0/1 0/1
0/50 0/50 0/50
Total
0/3
 
Using a periodic table (not Figure 9.15), arrange the following in order of increasing electronegativity. (List the atomic symbols from least to most electronegative, separated by commas.)
(a) B, Ne, N
Answer is not case sensitive.

(b) P, Ar, Al
Answer is not case sensitive.

(c) N, Al, Si
Answer is not case sensitive.


5. 2/2 points All Submissions Notes Question: EbGam8 10.PP.037.
Question part
Points
Submissions
1 2
1 1
4/50 2/50
Total
2/2
 
(a) The molecule AsF3 has a dipole moment of 2.59 D. Which of the following geometries are possible? (Select all that apply.)

Your answer is correct.



(b) The molecule H2S has a dipole moment of 0.97 D. Is the geometry linear or bent?
    

Your answer is correct.


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