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 48E
Although the preferred SI unit of area is the square meter, land is often measured in the metric system in hectares (ha). One hectare is equal to 10,000 m2. In the English system, land is often measured in acres (1 acre = 160 rod2). Use the exact conversions and those given in Exercise 47 to calculate the following.
- a. 1 ha = __________ km2
- b. The area of a 5.5-acre plot of land in hectares, square meters, and square kilometers
- c. A lot with dimensions 120 ft by 75 ft is to be sold for $6500. What is the price per acre? What is the price per hectare?
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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
To determine the density of a solution, the mass and volume of two samples are measured. The results are recorded in the table.
Sample 1
Sample 2
Mass (g)
9.90
9.84
Volume (mL)
10.0
10.07
In each sample, which measurement limits the number of significant digits in the calculated density?
a. both measurements are limiting
b. The mass measurement is limiting
c. The volume measurement is limiting
Sample 1____
Sample 2 ____
c.
Part D: Food Calories
Naked Juice
Serving size
240 mL
D1. Name of food product
D2. Mass of food nutrients in one serving
Fat
Carbohydrate 33
g, Protein
g,
D3. Calculations for Calories (Cal) or kilocalories (kcal) per serving
kcal (Cal)
Carbohydrate
Protein
kcal (Cal)
Fat
kcal (Cal)
D4. Total Calories (Cal or kcal) per serving
kcal (Cal)
D5. Calories (for one serving) listed on the label
cal (Cal)
D6. Percentage of total Calories from carbohydrate
%
(show calculations)
D7. Percentage of total Calories from protein
(show calculations)
%
D8. Percentage of total Calories from fat
(show calculations)
%
Q 4. How does your calculated number of Calories in one serving compare to the Calories listed
on the food product nutrition label? Comment on it.
Chapter 1 Solutions
Chemistry
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