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Ebbing and Gammon - General Chemistry 7/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 8 / 13

Due : Monday, September 9, 2019 08:15 EDT

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5
–/4 –/4 –/3 –/1 –/1
Total
8/13 (61.5%)

  • Instructions

    Here are some textbook questions from General Chemistry 7/e by Ebbing and Gammon published by Houghton Mifflin. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submission and allows you to try another version of the same question for practice.

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1. –/4 points EbGam7 1.PP.048. My Notes
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Which of the following are pure substances? Which are mixtures? For each, list all of the different phases present.
(a) a sugar solution with sugar crystals at the bottom

(b) ink containing a liquid solution with fine particles of carbon

(c) a sand containing quartz (silicon dioxide) and calcite (calcium carbonate)

(d) liquid water and steam at 100°C

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2. –/4 points EbGam7 2.PP.061. My Notes
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–/4
 
Give the molecular formula for each of the following structural formulas. (Type your answer using the form H2O for H2O.)
(a)
(No Response) seenKey

N2H4
(b)
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H2O2
(c)
(No Response) seenKey

C3H8O -or- C3H7OH
(d)
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PCl3
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3. –/3 points EbGam7 3.PP.085. My Notes
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–/3
 
Methanol, CH3OH, is prepared industrially from the gas-phase catalytic reaction that has been depicted here using molecular models.

In a laboratory test, a reaction vessel was filled with 31.9 g CO and 10.9 g H2.
How many grams of methanol would be produced in a complete reaction?
WebAssign will check your answer for the correct number of significant figures.(No Response) seenKey

36.5

 g Which reactant remains unconsumed at the end of the reaction?
    

How many grams of it remain?
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6.3

 g
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4. –/1 points EbGam7 4.PP.083. My Notes
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A solution of hydrogen peroxide, H2O2, is titrated with a solution of potassium permanganate, KMnO4. The reaction is shown below.

5 H2O2(aq) + 2 KMnO4(aq) + 3 H2SO4(aq) 5 O2(g) + 2 MnSO4(aq) + K2SO4(aq) + 8 H2O(l)

It requires 39.1 mL of 0.110 M KMnO4 to titrate 20.0 g of the solution of hydrogen peroxide. What is the mass percentage of H2O2 in the solution?
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1.83

 %
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5. –/1 points EbGam7 5.PP.031. My Notes
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A gas in a closed-tube manometer (Figure 5.4) has a measured pressure of 0.060 atm. Calculate the pressure in mmHg.
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46

 mmHg


Figure 5.4

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