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Chang - General Chemistry: Essential Concepts 4/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 9 / 12

Due : Thursday, September 5, 2019 08:00 EDT

Last Saved : n/a Saving...  ()

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Question
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9/12 (75.0%)

  • Instructions

    General Chemistry: The Essential Concepts 4/e by Raymond Chang published by McGraw-Hill Higher Education now has animations with conceptual questions and tutorial problems offering feedback and hints to guide student content mastery, as well as over 1150 end-of-chapter questions. You can check out a sampling of this exciting development below.

    Designed by teachers for teachers, WebAssign is easy to use and reliable -- a trusted companion to your teaching. Sign up for a Free Trial today!

    Click here for a list of all of the questions coded in WebAssign.

    Question 1 and 5 are algorithmic end-of-chapter problems with conditional feedback added to the numerical answers.

    Question 2 is an animation with an assignable quiz attached.

    Question 3 is a follow-up Practice Exercise which checks student understanding of the related Example in the textbook. Practice Exercise 3.13, for example, is directly related to Exercise 3.13.

    Question 4 is an end-of-chapter problem which has been converted into a multple choice format.

    Question 5 also shows how supplemental exercises with solutions can be used for practice to help the student learn the concept for the graded question. This demo assignment allows many submissions and allows you to try another version of the same question for practice.

Assignment Submission

For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

Your last submission is used for your score.

1. –/2 points ChangE4 3.AlgoEOCP.083. My Notes
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Nitric oxide (NO) reacts instantly with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas.

2 NO(g) + O2(g) 2 NO2(g)

In one experiment 0.666 mole of NO is mixed with 0.373 mole of O2.
Calculate which of the two reactants is the limiting reagent.
    

Calculate also the number of moles of NO2 produced.
WebAssign will check your answer for the correct number of significant figures.(No Response) mole
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2. –/5 points ChangE4 3.Animation.01. My Notes
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Limiting Reactant Use the animation to answer the following questions.
(a) In the animation reaction, if 4 NO and 4 O2 are mixed, how many molecules of the product form?
(No Response) molecules

(b) When 6 NO and 3 O2 are used in the reaction in the animation, the limiting reactant is:
    


(c) The opening of the valve between the two bulbs determines:
    

This animation will begin with a narration when you click "Open in New Window" below. To restart the narration, click "Open in New Window" again.
(d) If there is excess oxygen present in the reaction, this can be seen in the animation by the presence of:
    


(e) Which of the following characterizes the reaction shown in the animation which utilizes the 6 NO to 2 O2 mole ratio?
    
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3. –/2 points ChangE4 3.PracticeEx.13. My Notes
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Practice Exercise 3.13 about this problem
The reaction between nitric oxide (NO) and oxygen to form nitrogen dioxide (NO2) is a key step in photochemical smog formation.

2 NO(g) + O2(g) 2 NO2(g)

(a) How many moles of NO2 are formed by the complete reaction of 0.374 mole of O2?
WebAssign will check your answer for the correct number of significant figures.(No Response) moles
(b) How many grams of NO2 are formed by the complete reaction of 1.54 g of NO?
WebAssign will check your answer for the correct number of significant figures.(No Response) grams
HINTS
I'm Stuck
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4. –/1 points ChangE4 3.StaticEOCP.083. My Notes
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Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas:
2 NO(g) + O2(g) 2 NO2(g)
In one experiment 0.886 mole of NO is mixed with 0.503 mole of O2. Calculate the number of moles of NO2 produced (note: first determine which is the limiting reagent).
    
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5. –/2 points ChangE4 3.AlgoEOCP.085. My Notes
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Propane (C3H8) is a component of natural gas and is used in domestic cooking and heating.
(a) Balance the following equation representing the combustion of propane in air.

C3H8 + O2 CO2 + H2O

    

(b) How many grams of carbon dioxide can be produced by burning 4.15 moles of propane? Assume that oxygen is the excess reagent in this reaction.
WebAssign will check your answer for the correct number of significant figures.(No Response) g
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