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OpenStax - Chemistry: Atoms First 1/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 26 / 42

Due : Thursday, November 21, 2019 09:00 EST

Last Saved : n/a Saving...  ()

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Question
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–/2 –/4 –/2 –/2 –/24 –/2 –/2 –/1 –/3
Total
26/42 (61.9%)

  • Instructions

    Cengage is proud to support the open source teaching community through our partnership with OpenStax. OpenStax's Chemistry: Atoms First is now enriched with WebAssign homework questions and student learning resources and is available as a low-cost option. The WebAssign content includes immediate student feedback, question links to appropriate sections of the eBook, as well as complete unabridged access to the textbook from a dynamic table of contents.

    Questions 1-5 are end-of-chapter questions from the OpenStax Chemistry: Atoms First textbook. These questions contain full algorithmic solutions for all question parts and showcase the variety of randomizations that WebAssign performs (shown in red) as well as various modes for student responses.

    Questions 6-9 are from the exclusive WebAssign General Chemistry collection. This collection contains almost 1,400 questions that are correlated to OpenStax's Chemistry: Atoms First and feature feedback, step-by-step tutorials with Deep Help, and detailed algorithmic solutions. It can be added from "Free Additional Content" when creating your WebAssign course at no additional cost.

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1. –/2 points OSAtomsChem1 1.6.P.091. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
Total
–/2
 
Calculate these volumes.
(a)
What is the volume (in cm3) of 26 g ruthenium,
density = 12.16 g/cm3?
WebAssign will check your answer for the correct number of significant figures.(No Response) cm3
(b)
What is the volume (in L) of 3.50 g gaseous fluorine,
density = 1.553 g/L?
WebAssign will check your answer for the correct number of significant figures.(No Response) L
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2. –/4 points OSAtomsChem1 1.1.P.005. My Notes
Question Part
Points
Submissions Used
1 2 3 4
–/1 –/1 –/1 –/1
0/100 0/100 0/100 0/100
Total
–/4
 
Identify each of the bold items as a part of either the macroscopic domain, the microscopic domain, or the symbolic domain of chemistry. For those in the symbolic domain, indicate whether they are symbols for a macroscopic or a microscopic feature. (Select all that apply.)
(a)
A certain molecule contains one C atom and one O atom.

(b)
Gold wire has a density of about 19 g/cm3.

(c)
The bottle contains 14 grams of Fe powder.

(d)
A phosphorus molecule is composed of 4 phosphorus atoms.

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3. –/2 points OSAtomsChem1 11.2.P.011. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
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–/2
 
Consider the solutions presented.
(a)
Which of the following sketches best represents the ions in a solution of Ga(NO3)3(aq)?
    
(b)
Write a balanced chemical equation showing the products of the dissolution of Ga(NO3)3. (Include states-of-matter under the given conditions in your answer. Use the lowest possible whole number coefficients.)
(No Response)
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4. –/2 points OSAtomsChem1 10.1.P.018. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
Total
–/2
 
Under certain conditions, molecules of formic acid, HCOOH, form "dimers," pairs of formic acid molecules held together by strong intermolecular attractions.
Draw a dimer of formic acid, showing how two HCOOH molecules are held together. (Use the "Any" bond type to indicate intermolecular attractions.)
(No Response)
State the type of IMF that is responsible.
    
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5. –/24 points OSAtomsChem1 13.4.P.062. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100
Total
–/24
 
Please use the values in the resources listed below instead of the textbook values.
Complete the changes in concentrations (or pressure, if requested) for each of the following reactions.
(a)
Reaction 2 H2(g) + O2(g) equilibrium reaction arrow 2 H2O(g)
relative
change 		(No Response) (No Response) +2x
change in
concentration
(M) 		WebAssign will check your answer for the correct number of significant figures.(No Response) WebAssign will check your answer for the correct number of significant figures.(No Response) 1.70
(b)
Reaction CS2(g) + 4 H2(g) equilibrium reaction arrow CH4(g) + 2 H2S(g)
relative
change 		+x (No Response) (No Response) (No Response)
change in
concentration
(M) 		0.020 WebAssign will check your answer for the correct number of significant figures.(No Response) WebAssign will check your answer for the correct number of significant figures.(No Response) WebAssign will check your answer for the correct number of significant figures.(No Response)
(c)
Reaction H2(g) + Cl2(g) equilibrium reaction arrow 2 HCl(g)
relative change +x (No Response) (No Response)
change in
pressure
(atm) 		1.50 WebAssign will check your answer for the correct number of significant figures.(No Response) WebAssign will check your answer for the correct number of significant figures.(No Response)
(d)
Reaction 2 NH3(g) + 2 O2(g) equilibrium reaction arrow N2O(g) + 3 H2O(g)
relative change (No Response) (No Response) (No Response) +x
change in
pressure
(torr) 		WebAssign will check your answer for the correct number of significant figures.(No Response) WebAssign will check your answer for the correct number of significant figures.(No Response) WebAssign will check your answer for the correct number of significant figures.(No Response) 66.0
(e)
Reaction NH4HS(s) equilibrium reaction arrow NH3(g) + H2S(g)
relative change +x (No Response)
change in
concentration
(M) 		9.6 ✕ 10−6 WebAssign will check your answer for the correct number of significant figures.(No Response)
(f)
Reaction Fe(s) + 5 CO(g) equilibrium reaction arrow Fe(CO)4(g)
relative change (No Response) +x
change in
pressure
(atm) 		WebAssign will check your answer for the correct number of significant figures.(No Response) 0.021
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6. –/2 points OSAtomsChem1 6.1.WA.009. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
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–/2
 
(a) How many moles of CO2 contain 2.22 ✕ 1024 molecules?
WebAssign will check your answer for the correct number of significant figures.(No Response) mol CO2

(b) What number of moles is equivalent to 6.27 ✕ 1021 atoms of Hg?
WebAssign will check your answer for the correct number of significant figures.(No Response) mol Hg
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7. –/2 points OSAtomsChem1 6.2.WA.013. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/100 0/100
Total
–/2
 
Write the molecular and empirical formulas for the compound with the following structural formula.

molecular formula:

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empirical formula:

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8. –/1 points OSAtomsChem1 6.2.WA.014. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
Total
–/1
 
A compound has an empirical formula of C4H8O and a molar mass of 144 g/mol. What is the molecular formula?

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9. –/3 points OSAtomsChem1 6.2.WA.019. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/100 0/100 0/100
Total
–/3
 
A 0.5714 g sample of an unknown acid was titrated with NaOH and found to contain 4.957 ✕ 10−3 mol acid. Another sample of the substance was subjected to elemental analysis, where it was determined that the composition of the unknown material is 62.08% C, 10.39% H, and 27.53% O.
(a) What is the molar mass of the unknown acid?
WebAssign will check your answer for the correct number of significant figures.(No Response) g/mol

(b) What is the empirical formula of the unknown acid?

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(c) What is the molecular formula of the unknown acid?

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