WebAssign is not supported for this browser version. Some features or content might not work. System requirements

WebAssign

Welcome, demo@demo

(sign out)

Sunday, April 6, 2025 09:35 EDT

Home My Assignments Grades Communication Calendar My eBooks

Holt - Davis et al - Modern Chemistry 2006 (Homework)

James Finch

Chemistry - HS, section 1st period, Fall 2019

Instructor: Dr. Friendly

Current Score : 27 / 27

Due : Monday, August 26, 2019 18:00 EDT

Last Saved : n/a Saving...  ()

Print Assignment
Question
Points
1 2 3 4 5
–/4 –/3 –/2 –/6 –/12
Total
27/27 (100.0%)

  • Instructions

    Here are some textbook questions from Modern Chemistry by Raymond Davis, Regina Frey, Mickey Sarquis, and Jerry Sarquis published by Holt, Rinehart and Winston. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice.

Assignment Submission

For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

Your last submission is used for your score.

1. –/4 points HoltMChem06 2.P.038. My Notes
Question Part
Points
Submissions Used
1 2 3 4
–/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50
Total
–/4
 
How many significant figures are there in each of the following measurements?
(a) 0.4061 mL
(No Response) seenKey

4 -or- four
(b) 6000 g
(No Response) seenKey

1 -or- one
(c) 1.002 40 km
(No Response) seenKey

6 -or- six
(d) 700. mm
(No Response) seenKey

3 -or- three
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
2. –/3 points HoltMChem06 3.P.021. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/50 0/50 0/50
Total
–/3
 
How many atoms are there in each of the following?
(a) 2.30 mol Na
WebAssign will check your answer for the correct number of significant figures.(No Response) seenKey

1.39e+24

 atoms
(b) 6.729 mol Pb
WebAssign will check your answer for the correct number of significant figures.(No Response) seenKey

4.052e+24

 atoms
(c) 6.14 g Si
WebAssign will check your answer for the correct number of significant figures.(No Response) seenKey

1.32e+23

 atoms
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
3. –/2 points HoltMChem06 5.P.025. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
Total
–/2
 
(a) How do the atomic radii of main-group elements vary across a period and down a group? (Select all that apply.)

(b) Explain the basis for each trend. (Select all that apply.)

Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
4. –/6 points HoltMChem06 6.P.019. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6
–/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50
Total
–/6
 
Select the Lewis structures for the following atoms.
(a) boron

(b) phosphorus

(c) chlorine

(d) aluminum

(e) sulfur

(f) oxygen
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
5. –/12 points HoltMChem06 8.P.014. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10 11 12
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
–/12
 
Identify and correct each error in the following equations, and then balance each equation.
Type your answer using the following format:
CuCl2 for CuCl2
If each formula is correct, answer 'none' in the formula box.
2, 2, 1 for 2 H2O 2 H2 + O2
Use the lowest possible coefficients.
(a) Mg + HCl H2 + MgCl
identify each error (Select all that apply.)


corrected formula
(No Response) seenKey

MgCl2
coefficients for the balanced equation
(No Response) seenKey

1, 2, 1, 1

 		(b) H2O H2 + 2 O
identify each error (Select all that apply.)


corrected formula
(No Response) seenKey

O2
coefficients for the balanced equation
(No Response) seenKey

2, 2, 1
(c) NaI + Cl2 NaCl + I
identify each error (Select all that apply.)


corrected formula
(No Response) seenKey

I2
coefficients for the balanced equation
(No Response) seenKey

2, 1, 2, 1

 		(d) Mg + 2 F MgF2
identify each error (Select all that apply.)


corrected formula
(No Response) seenKey

F2
coefficients for the balanced equation
(No Response) seenKey

1, 1, 1
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
Home My Assignments