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McMurry and Fay - Chemistry 5/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2011

Instructor: Dr. Friendly

Current Score : 8 / 14

Due : Sunday, November 6, 2011 07:00 EST

Print Assignment
Question
Points
1 2 3 4 5
6 1 1/2 0/1 0/4
Total
8/14 (57.1%)

  • 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.

Assignment Submission

For this assignment, the number of submissions for each answer box is counted independently. The number of submissions remaining changes only if you submit a new or changed answer.

1. 6/6 points All Submissions Notes Question: McMF5 1.P.062.
Question part
Points
Submissions
1 2 3 4 5 6
1 1 1 1 1 1
1/50 1/50 2/50 3/50 3/50 3/50
Total
6/6
 
How many significant figures are in each of the following measurements?
(a) 35.1879 g
Enter an exact number.
Your answer is correct.

(b) 57.0001 cm
Enter an exact number.
Your answer is correct.

(c) 0.02008 kg
Enter an exact number.
Your answer is correct.

(d) 0.00710 m
Enter an exact number.
Your answer is correct.

(e) 25000 m2
Enter an exact number.
Your answer is correct.

(f) 3.7500 103 L
Enter an exact number.
Your answer is correct.

Your work in question(s) will also be submitted or saved.
2. 1/1 points All Submissions Notes Question: McMF5 2.P.029.
Question part
Points
Submissions
1
1
1/50
Total
1/1
 
If red and blue spheres represent atoms of different elements, which two of the following drawings illustrate the law of multiple proportions?
Your answer is correct.

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

Your work in question(s) will also be submitted or saved.
3. 1/2 points All Submissions Notes Question: McMF5 3.P.071.
Question part
Points
Submissions
1 2
0/1 1
2/50 2/50
Total
1/2
 
Hydrogen and chlorine react to yield hydrogen chloride.

H2 + Cl2 2 HCl

How many grams of HCl are formed from reaction of 3.53 g of H2 with 8.93 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.
Your answer is incorrect. g

Which reactant is limiting?
     Your answer is correct.

Your work in question(s) will also be submitted or saved.
4. –/1 points Notes Question: McMF5 4.P.091.
Question part
Points
Submissions
1
0/1
0/50
Total
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 21.27 mL of 0.000985 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
Your work in question(s) will also be submitted or saved.
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
Total
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 = 2
Answer is case sensitive.

Your work in question(s) will also be submitted or saved.
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