WebAssign

Tuesday, February 9, 2010 11:07 AM EST

Logged in as prenticehall@prenticehall

Logout

Corwin - Introductory Chemistry 5/e (Homework)

Chris Read

Prentice Hall, section 1, Fall 2010

Instructor: Mr. Prentice Hall

Current Score : 0 / 10

Due : Thursday, September 9, 2010 08:00 PM EDT

About this Assignment

Ask Your TeacherpopUp 

Extension RequestspopUp 

Question
Points
1 2 3 4 5 6 7
0/1 0/1 0/1 0/2 0/1 0/2 0/2
Total
0/10

Description

Here are some textbook questions from Introductory Chemistry: Concepts and Critical Thinking 5/e by Charles H. Corwin published by Prentice Hall. 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. –/1 points Notes Question: CorIntChem5 1.E.012.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Which of the following statements is a natural law? (Select all that apply.)




2. –/1 points Notes Question: CorIntChem5 2.E.008.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Which of the following measurements corresponds to using the buret shown in Figure 2.5 having an uncertainty of ± 0.05 mL? (Select all that apply.)




3. –/1 points Notes Question: CorIntChem5 3.E.090.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Calculate the mass of lead [0.0308 cal/(g multiplied by °C)] that releases 51.8 cal as the metal cools from 35.7°C to 25.1°C.
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g

4. –/2 points Notes Question: CorIntChem5 4.E.040.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
What is the total number of atoms in a molecule of each of the following compounds?
(a) cholesterol: C27H45OH
Answer is not case sensitive.


(b) quinine: C20H24N2O2
Answer is not case sensitive.


5. –/1 points Notes Question: CorIntChem5 5.E.034.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Calculate the atomic mass for magnesium given the following data for its natural isotopes.
24Mg 23.985 amu 78.70%
25Mg 24.986 amu 10.13%
26Mg 25.983 amu 11.17%
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 amu

6. –/2 points Notes Question: CorIntChem5 10.E.002.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Consider the general chemical equation.
2 A + 6 B → 8 C + 6 D
(a) How many moles of C are produced from 2 moles of A?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 mol

(b) How many liters of gas D are produced from 2 liters of gas A at the same temperature and pressure?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 L


7. –/2 points Notes Question: CorIntChem5 14.E.042.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Assume that 120 g of C12H22O11 is dissolved in 100 g of water at 100°C and the solution is allowed to cool to 20°C. (Refer to the figure.)
(a) How much solute remains in solution?
Enter a number.
 g

(b) How much solute crystallizes from the solution?
Enter a number.
 g

Home My Assignments Ask Your TeacherpopUp Extension RequestpopUp