WebAssign

Saturday, November 21, 2009 04:15 EST

Logged in as demo@demo

Logout

Silberberg - Chemistry: Matter and Change 4/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 6/14

Due: Saturday, January 15, 2011 08:00 EST

About this Assignment

Question
Points
1 2 3 4 5 6 7
5 0/2 0/2 0/3 1 0/1 0
Total
6/14

Description

Chemistry: The Molecular Nature of Matter and Change 4/e by Martin Silberberg published by McGraw-Hill Higher Education now has animations with conceptual questions and tutorial problems offering feedback and hints to guide student content mastery, as well as over 1150 end-of-chapter questions. You can check out a sampling of this exciting development below.

Designed by teachers for teachers, WebAssign is easy to use and reliable -- a trusted companion to your teaching. Sign up for a Free Trial today!

Question 1 is an animation with an assignable quiz attached.

Question 2 is a Follow-up Problem which checks student understanding of the related Sample Problem in the textbook. Follow-up Problem 3.1, for example, is directly related to Sample Problem 3.1.

Question 3 and 4 are algorithmic end-of-chapter problems with conditional feedback added to the numerical answers.

Question 5 is an end-of-chapter problem which has been converted into a multple choice format. These questions are available for every question in Silberberg.

Question 6 is a supplemental "testbank" style question. These questions provide additional coverage of topics throughout the textbook.

Question 7 is a preview of Chapter 3 content for Chemistry: The Molecular Nature of Matter and Change 4/e by Silberberg.


Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.



1. 5/5 points All Submissions Notes Question: Silber4 3.Animation.03.
Question part
Points
Submissions
1 2 3 4 5
1 1 1 1 1
1/50 3/50 1/50 1/50 2/50
Total
5/5
 
Stoichiometry Use the animation to answer the following questions.
(a) In the reaction of H2 with O2, if the maximum amount of O2 is used:
    

Your answer is correct.



(b) In the reaction of H2 with O2, if 6 moles of H2 molecules are used:
    

Your answer is correct.



(c) When H2 reacts with I2, as the number of moles of product increases:
    

Your answer is correct.



(d) In the reaction producing HI, if 768 grams of HI form:
    

Your answer is correct.



(e) Consider the reaction: H + H H2. This is the only reaction in the animation in which:
    

Your answer is correct.


2. 0/2 points All Submissions Notes Question: Silber4 3.FollowUp.01.
Question part
Points
Submissions
1 2
0/1 0/1
2/50 0/50
Total
0/2
 
FOLLOW-UP PROBLEM 3.1 Calculating the Mass and Number of Atoms in a Given Number of Moles of an Element about this problem
(a) Graphite is the crystalline form of carbon used in lead pencils. How many moles of carbon are there in 325 mg of graphite?
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. mol Your answer differs from the correct answer by orders of magnitude.
(b) Manganese (Mn) is a transition element essential for the growth of bones. What is the mass in grams of 6.44 1020 Mn atoms, the number found in 2.00 kg of bone.
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g
HINTS
Getting Started
I'm Stuck


3. –/2 points Notes Question: Silber4 3.AlgoEOCP.023.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Cisplatin (below) is a powerful drug used in the treatment of certain cancers.
(a) Calculate the moles of compound in 240.8 g cisplatin.
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 mol
(b) Calculate the number of hydrogen atoms in 0.97 mol cisplatin.
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 atoms


4. –/3 points Notes Question: Silber4 3.AlgoEOCP.012.
Question part
Points
Submissions
1 2 3
0/1 0/1 0/1
0/50 0/50 0/50
Total
0/3
 
Calculate each of the following quantities.
(a) mass in grams of 0.67 mol KMnO4
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g
(b) moles of O atoms in 8.13 g Mg(NO3)2
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 mol
(c) number of O atoms in 9.3 10-3 g CuSO4·5 H2O
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 atoms


5. 1/1 points All Submissions Notes Question: Silber4 3.StaticEOCP.049.
Question part
Points
Submissions
1
1
1/50
Total
1/1
 
In the process of balancing the equation:
Al + Cl2 AlCl3
Student I writes: Al + Cl2 AlCl2
Student II writes: Al + Cl2 + Cl AlCl3
Student III writes: 2 Al + 3 Cl2 2 AlCl3

Which student has written the correct balanced chemical equation for the reaction?
    

Your answer is correct.



6. –/1 points Notes Question: Silber4 3.Supp.3-01.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Which of the following chemical equations is NOT balanced?
    



7. –/0 points Notes
Question part
Points
Submissions
Total
0/0
 
Click Chapter 3 to preview more questions in Chemistry: The Molecular Nature of Matter and Change 4/e by Silberberg.

The following table lists the various types of questions which are being included in every chapter in this book, along with an estimated number per chapter which will be available.

Guide to WebAssign Resources in Silberberg Chemistry 4/e
Type of Question Example Code (name) Number per chapter
Algorithmic end of chapter Problem 1.AlgoEOCP.055. 75
Static (multiple choice) End Of Chapter Problem 1.StaticEOCP.055. 300
Animation with follow-up quiz 1.Animation.01. 3 - 5
Algorithmic Follow-Up Problem -- from Sample Problems in textbook 1.FollowUp.01. 8 - 9
Supplemental multiple choice questions, with explanatory solutions 1.Supp.001. 60
Test Bank of related multiple choice questions 1.TB.001. 100

Home My Assignments