Brown, LeMay, Bursten - Chemistry 9e (Homework)

James Finch

Chemistry - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 51/53

Due: Wednesday, August 25, 2010 08:15 EDT

Question

Points

1	2	3	4	5
4	14	27	6	0/2

Total

51/53

Description

Here are some textbook questions from Chemistry: The Central Science 9/e by Brown, LeMay, and Bursten 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.

1. 4/4 points All Submissions Notes Question: BLB9 1.P.043.

Question part

Points

Submissions

1	2	3	4
1	1	1	1
1/50	3/50	2/50	11/50

Total

4/4

Perform the following conversions.

(a) 0.074 L to mL
Enter a number with the correct number of significant figures.
1 mL
(b) 3.0 10^-8 m to nm
Enter a number with the correct number of significant figures.
2 nm
(c) 6.78 10⁵ ns to s
Enter a number with the correct number of significant figures.
3 s
(d) 1.70 kg/m³ to g/L
Enter a number with the correct number of significant figures.
4 g/L

2. 14/14 points All Submissions Notes Question: BLB9 2.P.030.

Question part

Points

Submissions

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
1/50	1/50	1/50	1/50	2/50	2/50	2/50	2/50	1/50	2/50	2/50	2/50	1/50	1/50

Total

14/14

3. 27/27 points All Submissions Notes Question: BLB9 3.P.006.

Question part

Points

Submissions

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27
1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
1/50	1/50	1/50	2/50	1/50	1/50	2/50	1/50	2/50	1/50	2/50	1/50	1/50	1/50	1/50	2/50	2/50	1/50	1/50	1/50	2/50	1/50	2/50	2/50	2/50	2/50	2/50

Total

27/27

Balance the following equations. (Use the smallest whole numbers possible. Enter 1 where appropriate - do not leave any answer box blank.)

(a)
Enter a number.
1KNO₃(s)
Enter a number.
2KNO₂(s) +
Enter a number.
3O₂(g)

(b)
Enter a number.
4La₂O₃(s) +
Enter a number.
5H₂O(l)
Enter a number.
6La(OH)₃(aq)

(c)
Enter a number.
7NCl₃(aq) +
Enter a number.
8H₂O(l)
Enter a number.
9NH₃(aq) +
Enter a number.
10HOCl(aq)

(d)
Enter a number.
11Mg₃N₂(s) +
Enter a number.
12HCl(aq)
Enter a number.
13MgCl₂(aq) +
Enter a number.
14NH₄Cl(aq)

(e)
Enter a number.
15AgNO₃(aq) +
Enter a number.
16K₂SO₄(aq)
Enter a number.
17Ag₂SO₄(s) +
Enter a number.
18KNO₃(aq)

(f)
Enter a number.
19Al(OH)₃(s) +
Enter a number.
20H₂SO₄(aq)
Enter a number.
21Al₂(SO₄)₃(aq) +
Enter a number.
22H₂O(l)

(g)
Enter a number.
23CH₃NH₂(g) +
Enter a number.
24O₂(g)
Enter a number.
25CO₂(g) +
Enter a number.
26H₂O(g) +
Enter a number.
27N₂(g)

4. 6/6 points All Submissions Notes Question: BLB9 4.P.010.

Question part

Points

Submissions

1	2	3	4	5	6
1	1	1	1	1	1
1/50	1/50	1/50	1/50	1/50	1/50

Total

6/6

Methanol, CH₃OH, is a nonelectrolyte; hypochlorous acid, HClO, is a weak electrolyte; and nitric acid, HNO₃, is a strong electrolyte. What are the solute particles present in aqueous solutions of each compound? (Select all that apply.)

methanol	hypochlorous acid	nitric acid
1 OH ^- CH₃OH CH₃O^- O^2- CH₃OH₂⁺ H⁺	2 HClO H⁺ OH ^- O^2- HCl²⁺ ClO^-	3 OH ^- HNO₂²⁺ NO₃^- HNO₃ H⁺ HNO₂

If 0.1 mol of each compound is dissolved in solution, which one contains 0.2 mol of solute particles, which contains 0.1 mol of solute particles, and which contains somewhere between 0.1 and 0.2 mol of solute particles?

0.2 mol solute particles 4

0.1 mol solute particles 5

between 0.1 and 0.2 mol solute particles 6

5. –/2 points Notes Question: BLB9 5.P.040.

Question part

Points

Submissions

1	2
0/1	0/1
0/50	0/50

Total

0/2

A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in Figure 5.3. When 440. J of heat is added to the gas, it expands and does 95 J of work on the surroundings.
What is the value of

WebAssign will check your answer for the correct number of significant figures.

J
Find

E for this process.

Figure 5.3

(a) fluorine Answer is case sensitive. 1 2 metal metalloid nonmetal	(b) potassium Answer is case sensitive. 3 4 metal metalloid nonmetal	(c) calcium Answer is case sensitive. 5 6 metal metalloid nonmetal
(d) silicon Answer is case sensitive. 7 8 metal metalloid nonmetal	(e) tellurium Answer is case sensitive. 9 10 metal metalloid nonmetal	(f) astatine Answer is case sensitive. 11 12 metal metalloid nonmetal
(g) phosphorus Answer is case sensitive. 13 14 metal metalloid nonmetal

0.2 mol solute particles	4
0.1 mol solute particles	5
between 0.1 and 0.2 mol solute particles	6

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Brown, LeMay, Bursten - Chemistry 9e (Homework)

Current Score: 51/53