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Chang - Chemistry 7/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 27 / 32

Due : Wednesday, September 4, 2019 08:15 EDT

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5
–/10 –/14 –/2 –/3 –/3
Total
27/32 (84.4%)

  • Instructions

    Here are some textbook questions from Chemistry 7/e by Raymond Chang published by McGraw-Hill Higher Education. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and makes the answer key available after the first submission so you can see the correct answers. (Typically, the answer key is posted after the due date!)

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. –/10 points Chang7 1.TB.013. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
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–/10
 
Match each element to its chemical symbol.
lithium (No Response)
fluorine (No Response)
phosphorus (No Response)
copper (No Response)
zinc (No Response)
chlorine (No Response)
platinum (No Response)
magnesium (No Response)
uranium (No Response)
silicon (No Response)
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2. –/14 points Chang7 2.P.015. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10 11 12 13 14
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
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–/14
 
For each of the following species, determine the number of protons and the number of neutrons in the nucleus.
(a) 42He
(No Response) protons
(No Response) neutrons		(b) 19578Pt
(No Response) protons
(No Response) neutrons		(c) 2412Mg
(No Response) protons
(No Response) neutrons
(d) 7935Br
(No Response) protons
(No Response) neutrons		(e) 32He
(No Response) protons
(No Response) neutrons		(f) 4822Ti
(No Response) protons
(No Response) neutrons
(g) 2512Mg
(No Response) protons
(No Response) neutrons
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3. –/2 points Chang7 3.P.075. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
Total
–/2
 
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 0.565 mole of NO is mixed with 0.391 mole of O2. Determine which of the two reactants is the limiting reagent.
    

Calculate the number of moles of NO2 produced.
WebAssign will check your answer for the correct number of significant figures.(No Response) mol
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4. –/3 points Chang7 4.P.079. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/50 0/50 0/50
Total
–/3
 
Calculate the volume in mL of a 1.420 M NaOH solution required to titrate the following solutions.
(a) 10.00 mL of a 2.430 M HCl solution
WebAssign will check your answer for the correct number of significant figures.(No Response) mL
(b) 25.00 mL of a 3.000 M H2SO4 solution
WebAssign will check your answer for the correct number of significant figures.(No Response) mL
(c) 75.00 mL of a 1.500 M H3PO4 solution
WebAssign will check your answer for the correct number of significant figures.(No Response) mL
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5. –/3 points Chang7 5.P.051. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/50 0/50 0/50
Total
–/3
 
What is the mass of the solid NH4Cl formed when 78.0 g of NH3 are mixed with an equal mass of HCl?
WebAssign will check your answer for the correct number of significant figures.(No Response) g
What is the volume of the gas remaining, measured at 14.0°C and 752 mmHg?
WebAssign will check your answer for the correct number of significant figures.(No Response) LWhat gas is it?
    
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