WebAssign

Tuesday, February 9, 2010 09:21 AM EST

Logged in as whfreeman@whfreeman

Logout

Jones and Atkins - Chemistry 4/e (Homework)

Chris Read

W.H. Freeman, section 1, Fall 2010

Instructor: Mr. Freeman

Current Score : 0 / 21

Due : Saturday, October 23, 2010 07:00 PM EDT

About this Assignment

Question
Points
1 2 3 4 5
0/8 0/2 0/3 0/6 0/2
Total
0/21

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.



1. –/8 points Notes Question: JonAt4 1.E.028.
Question part
Points
Submissions
1 2 3 4 5 6 7 8
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
0/8
 
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) calcium
    


formula
Answer is not case sensitive.

 (b) magnesium
    


formula
Answer is not case sensitive.
(c) sulfur
    


formula
Answer is not case sensitive.

 (d) aluminum
    


formula
Answer is not case sensitive.


2. –/2 points Notes Question: JonAt4 2.E.026.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
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.
 mL
(b) WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 mL


3. –/3 points Notes Question: JonAt4 2.E.046.
Question part
Points
Submissions
1 2 3
0/1 0/1 0/1
0/50 0/50 0/50
Total
0/3
 
Which sample in each of the following pairs contains the greater number of moles of atoms?
(a) 21 g of carbon or 30. g of silicon
    


(b) 1.0 g of Au or 1.0 g of Hg
    


(c) 2.57 1022 atoms of Au or 2.49 1022 atoms of Hg
    



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

base
Answer is case sensitive.


(b) HNO3(aq) + CH3NH2(aq) CH3NH3+(aq) + NO3-(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.


5. –/2 points Notes Question: JonAt4 4.E.084.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
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.

(b) How many grams of the solid can be formed from 207 g of calcium nitrate and 143 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.
 g

Home My Assignments