Olmsted and Williams - Chemistry 4/e (Homework)

Chris Read

Wiley, section 1, Fall 2010

Instructor: Mr. Wiley

Current Score: 0/16

Due: Friday, October 8, 2010 08:00 PM EDT

About this Assignment

Question
Points
1 2 3 4 5
0/6 0/2 0/3 0/2 0/3
Total
0/16

Description

Here are some textbook questions from Chemistry 4/e by John Olmsted III and Gregory M. Williams published by John Wiley & Sons, Inc. 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. –/6 points Notes Question: OlmsChem4 3.CR.051.
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Calculate the concentrations of the major ionic species present in each of the following solutions.
(a) 4.77 g Na2CO3 in 280. mL of solution
cation
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Enter a number with the correct number of significant figures.
 M
anion
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Enter a number with the correct number of significant figures.
 M

(b) 27.79 mg of NH4Cl in 1.29 10-2 L of solution
cation
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Enter a number with the correct number of significant figures.
 M
anion
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 M

(c) 2.25 kg potassium sulfate in 5.68 103 L of solution
cation
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 M
anion
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 M


2. –/2 points Notes Question: OlmsChem4 4.CR.042.
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If 77.0 mL of a 0.850 M solution of lead(II) nitrate is mixed with 127 mL of 0.851 M ammonium chloride, what mass of solid forms, and what ions remain in solution?
mass of solid formed
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g
ions remaining in the solution (Select all that apply.)




3. –/3 points Notes Question: OlmsChem4 7.CR.025.
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Determine the wavelengths that hydrogen atoms absorb to reach the n = 5 and n = 9 states from the ground state.


Figure 6.4

n = 5
Enter a number.
 m
n = 9
Enter a number.
 m
In what region of the electromagnetic spectrum do these photons lie?
    



4. –/2 points Notes Question: OlmsChem4 10.CR.042.
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Which of the following molecules are stabilized by delocalized orbitals? (Select all that apply.)



For those that are, identify the atoms over which delocalization extends.


5. –/3 points Notes Question: OlmsChem4 16.CR.047.
Question part
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Identify the spectator ions present when the following are mixed. (Select all that apply.)
(a) a solution of CH3CO2H and a solution of NaOH



(b) a solution of CaCl2 and a solution of K3PO4



(c) a solution of HNO3 and a solution of KOH



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