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Blei and Odian - GOB: Connecting Chem to Your Life (Homework)

Chris Read

W.H. Freeman, section 1, Fall 2010

Instructor: Mr. Freeman

Current Score : 0 / 13

Due : Friday, August 27, 2010 07:00 PM EDT

About this Assignment

Question
Points
1 2 3 4 5
0/2 0/2 0/6 0/1 0/2
Total
0/13 (0.0%)

Description

Here are some textbook questions from General, Organic, and Biochemistry: Connecting Chemistry to Your Life 2/e by Ira Blei and George Odian 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. –/2 points Notes Question: BOGOB2 1.E.018.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Report the result of dividing the following numbers, with strict attention to the correct number of significant figures in the answers.
(a) 13.67 by 1.23
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.

(b) 0.095 by 1.435
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.


2. –/2 points Notes Question: BOGOB2 1.E.020.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
What is the result of subtracting the following numbers?
(a) 2.769 from 3.91
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.

(b) 54.832 from 89.1
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.


3. –/6 points Notes Question: BOGOB2 4.E.068.
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
 
Aspirin (C9H8O4) is synthesized by the reaction of acetic anhydride (C4H6O3) and salicylic acid (C7H6O3).
(a) Balance the following unbalanced equation. (Use the lowest possible coefficients.)
Answer is not case sensitive.
C7H6O3 +
Answer is not case sensitive.
C4H6O3
Answer is not case sensitive.
C9H8O4 +
Answer is not case sensitive.
H2O

(b) What mass of acetic anhydride will react with 21 g of salicylic acid?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g

(c) What mass of aspirin will be produced in the reaction?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g


4. 0/1 points All Submissions Notes Question: BOGOB2 6.E.018.
Question part
Points
Submissions
1
0/1
1/50
Total
0/1
 
Between which of the following pairs of molecules can hydrogen bonds be formed? (Select all that apply.)

Your answer is incorrect.




5. –/2 points Notes Question: BOGOB2 7.E.040.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Calculate the osmolarity of the following aqueous solutions.
(a) 0.55 M glucose
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 osmol/L
(b) 0.22 M CaCl2
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 osmol/L

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