Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 1, Problem 122CP
As part of a science project, you study traffic patterns in your city at an intersection in the middle of downtown. You set up a device that counts the ears passing through this intersection for a 24-hr period during a weekday. The graph of hourly traffic looks like this.
- a. At what time(s) does the highest number of cars pass through die intersection?
- b. At what time(s) does the lowest number of cars pass through die intersection?
- c. Briefly describe the trend in numbers of cars over the course of die day.
- d. Provide a hypothesis explaining the trend in numbers of cars over the course of the day.
- e. Provide a possible experiment that could test your hypothesis.
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7. A concentrated sulfuric acid solution is 65.0% H₂SO4 by mass and has a density of 1.55 g/mL
at 20°C. What is the mass of 9.00 L of the concentrated sulfuric acid solution?
A. 5.85 kg
B. 9.00 kg
C 21.4 kg
D. 3.77 kg
€13.9 kg
9.0L |1.559
0.001
= 13.95
17. A contaminated pond has a lead(II) ion concentration of 1.4 mg/L. This pond has a surface area of
135 ft² and an average depth of 2.8 ft. What mass (in grams) of lead could be recovered from the pond?
Possibly useful information is shown below:
1 ft³=28.7 L
1 ft³ = 7.48 gallon 1 m = 3.281 ft
Chapter 1 Solutions
Chemistry
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