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Jones and Atkins - Chemistry 4/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2011

Instructor: Dr. Friendly

Current Score : 8 / 21

Due : Sunday, October 16, 2011 08:00 EDT

Print Assignment
Question
Points
1 2 3 4 5
4/8 2 1/3 0/6 1/2
Total
8/21 (38.1%)

  • Description

    Here are some textbook questions from Chemistry: Molecules, Matter, and Change 4/e by Jones and Atkins published by W. H. Freeman. 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. 4/8 points All Submissions Notes Question: JonAt4 1.E.028.
Question part
Points
Submissions
1 2 3 4 5 6 7 8
1 0/1 1 0/1 1 0/1 1 0/1
1/50 1/50 1/50 1/50 1/50 1/50 1/50 1/50
Total
4/8
 
State whether each of the following elements is more likely form a cation or an anion and write the formula for that ion. (Type your answer for the formula using the format [F]- for F - and [Ba]2+ for Ba2+.)
(a) sulfur
     Your answer is correct.

formula
Answer is not case sensitive.
Your answer is incorrect.[S]2-
 (b) calcium
     Your answer is correct.

formula
Answer is not case sensitive.
Your answer is incorrect.[Ca]2+
(c) gallium
     Your answer is correct.

formula
Answer is not case sensitive.
Your answer is incorrect.[Ga]3+
 (d) oxygen
     Your answer is correct.

formula
Answer is not case sensitive.
Your answer is incorrect.[O]2-

Your work in question(s) will also be submitted or saved.
2. 2/2 points All Submissions Notes Question: JonAt4 2.E.026.
Question part
Points
Submissions
1 2
1 1
2/50 2/50
Total
2/2
 
Record the volumes of solution in milliliters in the two graduated cylinders shown below. Report the volumes, using the correct number of significant figures.
(a) (b)
(a) 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.7.42 mL
(b) 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.58 mL

Your work in question(s) will also be submitted or saved.
3. 1/3 points All Submissions Notes Question: JonAt4 2.E.046.
Question part
Points
Submissions
1 2 3
0/1 1 0/1
1/50 1/50 1/50
Total
1/3
 
Which sample in each of the following pairs contains the greater number of moles of atoms?
(a) 27 g of carbon or 37 g of silicon
     Your answer is incorrect.

(b) 1.0 g of Au or 1.0 g of Hg
     Your answer is correct.

(c) 2.26 1022 atoms of Au or 2.18 1022 atoms of Hg
     Your answer is incorrect.

Your work in question(s) will also be submitted or saved.
4. –/6 points Notes Question: JonAt4 3.E.038.
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
Total
0/6
 
Identify the acid and the base in the following reactions. (Type your answer using the format CO2 for CO2, (NH4)2CO3 for (NH4)2CO3, [NH4]+ for NH4+, and [Ni(CN)4]2- for Ni(CN)42-.)
(a) HCl(aq) + NH3(aq) NH4+(aq) + Cl -(aq)
acid
Answer is case sensitive.

base
Answer is case sensitive.


(b) (CH3)3N(aq) + HCl(aq) (CH3)3NH+ (aq) + Cl -(aq)
acid
Answer is case sensitive.

base
Answer is case sensitive.


(c) NH3(aq) + HCN(aq) NH3+(aq) + CN -(aq)
acid
Answer is case sensitive.

base
Answer is case sensitive.

Your work in question(s) will also be submitted or saved.
5. 1/2 points All Submissions Notes Question: JonAt4 4.E.084.
Question part
Points
Submissions
1 2
1 0/1
2/50 1/50
Total
1/2
 
When aqueous solutions of calcium nitrate and phosphoric acid are mixed, a white solid precipitates.
(a) What is the formula of the solid? (Type your answer using the format CO2 for CO2.)
Answer is case sensitive.
Your answer is correct.Ca3(PO4)2
(b) How many grams of the solid can be formed from 226 g of calcium nitrate and 166 g of phosphoric acid?
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.142 g

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