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Corwin - Introductory Chemistry 5/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2011

Instructor: Dr. Friendly

Current Score : 0 / 10

Due : Tuesday, September 6, 2011 08:00 EDT

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0/1 0/1 0/1 0/2 0/1 0/2 0/2
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  • Description

    Here are some textbook questions from Introductory Chemistry: Concepts and Critical Thinking 5/e by Charles H. Corwin published by Prentice Hall. 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.

Assignment Submission

For this assignment, the number of submissions for each answer box is counted independently. The number of submissions remaining changes only if you submit a new or changed answer.

1. –/1 points Notes Question: CorIntChem5 1.E.012.
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Which of the following statements is a natural law? (Select all that apply.)


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2. –/1 points Notes Question: CorIntChem5 2.E.008.
Question part
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Which of the following measurements corresponds to using the buret shown in Figure 2.5 having an uncertainty of ± 0.05 mL? (Select all that apply.)


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3. –/1 points Notes Question: CorIntChem5 3.E.090.
Question part
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Calculate the mass of lead [0.0308 cal/(g multiplied by °C)] that releases 53.0 cal as the metal cools from 35.7°C to 25.1°C.
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 g
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4. –/2 points Notes Question: CorIntChem5 4.E.040.
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What is the total number of atoms in a molecule of each of the following compounds?
(a) stearic acid (in animal fats): CH3(CH2)16COOH
Answer is not case sensitive.


(b) triolein (in vegetable oils): C3H5(C17H33COO)3
Answer is not case sensitive.

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5. –/1 points Notes Question: CorIntChem5 5.E.034.
Question part
Points
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Calculate the atomic mass for magnesium given the following data for its natural isotopes.
24Mg 23.985 amu 78.70%
25Mg 24.986 amu 10.13%
26Mg 25.983 amu 11.17%
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 amu
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6. –/2 points Notes Question: CorIntChem5 10.E.002.
Question part
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Consider the general chemical equation.
5 A + 6 B → 2 C + 6 D
(a) How many moles of C are produced from 5 moles of A?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 mol

(b) How many liters of gas D are produced from 5 liters of gas A at the same temperature and pressure?
WebAssign will check your answer for the correct number of significant figures.
Enter a number with the correct number of significant figures.
 L

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7. –/2 points Notes Question: CorIntChem5 14.E.042.
Question part
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Assume that 150 g of C12H22O11 is dissolved in 100 g of water at 85°C and the solution is allowed to cool to 10°C. (Refer to the figure.)
(a) How much solute remains in solution?
Enter a number.
 g

(b) How much solute crystallizes from the solution?
Enter a number.
 g

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