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McMurry and Fay - Chemistry 5/e (Homework)

Chris Read

Prentice Hall, section 1, Fall 2010

Instructor: Mr. Prentice Hall

Current Score : 0 / 14

Due : Sunday, November 7, 2010 08:00 PM EST

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Question
Points
1 2 3 4 5
0/6 0/1 0/2 0/1 0/4
Total
0/14

Description

Here are some textbook questions from Chemistry 5/e by John McMurry and Robert C. Fay published by Prentice Hall. 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. –/6 points Notes Question: McMF5 1.P.062.
Question part
Points
Submissions
1 2 3 4 5 6
0/1 0/1 0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50 0/50 0/50
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0/6
 
How many significant figures are in each of the following measurements?
(a) 35.1641 g
Enter an exact number.


(b) 57.0007 cm
Enter an exact number.


(c) 0.02005 kg
Enter an exact number.


(d) 0.00870 m
Enter an exact number.


(e) 19000 m2
Enter an exact number.


(f) 3.1300 103 L
Enter an exact number.


2. –/1 points Notes Question: McMF5 2.P.029.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
If red and blue spheres represent atoms of different elements, which two of the following drawings illustrate the law of multiple proportions?


(a)(b)
(c)(d)


3. –/2 points Notes Question: McMF5 3.P.071.
Question part
Points
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1 2
0/1 0/1
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0/2
 
Hydrogen and chlorine react to yield hydrogen chloride.

H2 + Cl2 2 HCl

How many grams of HCl are formed from reaction of 3.64 g of H2 with 8.87 g of Cl2?
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 is limiting?
    



4. –/1 points Notes Question: McMF5 4.P.091.
Question part
Points
Submissions
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0/1
0/50
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0/1
 
Calcium levels in blood can be determined by adding oxalate ion to precipitate calcium oxalate, CaC2O4, followed by dissolving the precipitate in aqueous acid and titrating the oxalic acid (H2C2O4) with KMnO4.

5 H2C2O4(aq) + 2 MnO4-(aq) + 6 H+(aq) 10 CO2(g) + 2 Mn2+(aq) + 8 H2O(l)

How many milligrams of Ca2+ are present in 10.0 mL of blood if 21.03 mL of 0.000971 M KMnO4 solution is needed for the titration?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 mg

5. –/4 points Notes Question: McMF5 5.P.059.
Question part
Points
Submissions
1 2 3 4
0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50
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0/4
 
Give the orbital designations of electrons with the following quantum numbers. (Type your answer using the format 1s for 1s.)
(a) n = 3, l = 0, ml = 0
Answer is case sensitive.


(b) n = 2, l = 1, ml = 0
Answer is case sensitive.


(c) n = 4, l = 3, ml = -2
Answer is case sensitive.


(d) n = 4, l = 2, ml = 0
Answer is case sensitive.

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