WebAssign

Thursday, September 2, 2010 10:46 EDT

Logged in as demo@demo

Log out

Glencoe Chemistry: Matter and Change 2008 (Homework)

James Finch

Chemistry - HS, section 1st period, Fall 2011

Instructor: Dr. Friendly

Current Score : 8 / 13

Due : Tuesday, August 23, 2011 16:00 EDT

Print Assignment
Question
Points
1 2 3 4 5 6
1 4 3 0/1 0/3 0/1
Total
8/13 (61.5%)

  • Description

    Here are some textbook questions from Glencoe Chemistry: Matter and Change 2008 published by Glencoe/McGraw-Hill. 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 wherever the problem has randomized values.

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. 1/1 points All Submissions Notes Question: GChemMC08 1.STP.002.
Question part
Points
Submissions
1
1
3/50
Total
1/1
 
What must be a constant during the experiment?
     Your answer is correct.

Your work in question(s) will also be submitted or saved.
2. 4/4 points All Submissions Notes Question: GChemMC08 2.pp.042.
Question part
Points
Submissions
1 2 3 4
1 1 1 1
1/50 1/50 1/50 1/50
Total
4/4
 
Complete the following calculations. Round off the answers to the correct number of significant figures.
(a) 35 m multiplied by 3.26 m
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 correct. m2

(b) 120 m multiplied by 0.26 m
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 correct. m2

(c) 1.46 m multiplied by 2.0 m
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 correct. m2

(d) 53.0 m multiplied by 2.38 m
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 correct. m2

Your work in question(s) will also be submitted or saved.
3. 3/3 points All Submissions Notes Question: GChemMC08 3.ca.077.
Question part
Points
Submissions
1 2 3
1 1 1
1/50 1/50 1/50
Total
3/3
 
Carbon reacts with oxygen to form two different compounds. Compound I contains 4.80 g carbon for every 6.41 g of oxygen. Compound II contains 20.18 g carbon for every 53.8 g of oxygen. What is the ratio of carbon to a fixed mass of oxygen for the two compounds?
Compound Mass C (g) Mass O (g) MassC / MassO
I 4.80 6.41
Enter a number.
Your answer is correct.
II 20.18 53.8
Enter a number.
Your answer is correct.

mass ratio of compound I / mass ratio of compound II
Enter a number.
Your answer is correct.
Your work in question(s) will also be submitted or saved.
4. –/1 points Notes Question: GChemMC08 5.ca.086.
Question part
Points
Submissions
1 2 3 4 5
0/1 0 0 0 0
0/50 0/50 0/50 0/50 0/50
Total
0/1
 
Use noble-gas notation to describe the electron configurations of the elements represented by the following symbols.
(a) Sm

chemPad

Help

 


(b) Kr

chemPad

Help

 


(c) P

chemPad

Help

 


(d) Zr

chemPad

Help

 


(e) W

chemPad

Help

 

Your work in question(s) will also be submitted or saved.
5. –/3 points Notes Question: GChemMC08 5.ca.090.mrv.
Question part
Points
Submissions
1 2 3
0/1 0/1 0/1
0/50 0/50 0/50
Total
0/3
 
Draw an electron-dot structure for an atom of each of the following elements.
(a) arsenic

MarvinSketch

Help

  1. Click Open MarvinSketch.
  2. Use MarvinSketch to draw the
    chemical structure.
  3. Click Finished when you are done.
Open MarvinSketch


(b) potassium

MarvinSketch

Help

  1. Click Open MarvinSketch.
  2. Use MarvinSketch to draw the
    chemical structure.
  3. Click Finished when you are done.
Open MarvinSketch


(c) carbon

MarvinSketch

Help

  1. Click Open MarvinSketch.
  2. Use MarvinSketch to draw the
    chemical structure.
  3. Click Finished when you are done.
Open MarvinSketch

Your work in question(s) will also be submitted or saved.
6. 0/1 points All Submissions Notes Question: GChemMC08 6.sa.002.
Question part
Points
Submissions
1
0/1
2/50
Total
0/1
 
Use this simplified version of the periodic table to indicate the location of group VIIIB. (Select all that apply.)
                               
                   
                   
 
               

Your answer is incorrect.
Your work in question(s) will also be submitted or saved.
Home My Assignments