Homework Help is Here – Start Your Trial Now!
Science
Chemistry
4A) A new penny has a mass of 2.49g and a volume of 0.349cm³. Is the penny pure copper?

4A) A new penny has a mass of 2.49g and a volume of 0.349cm³. Is the penny pure copper?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
See similar textbooks
icon
Related questions
Question
--- ### Educational Exercise: Fuels, Heat Capacity, and Significant Figures #### 5. Fuel Costs Conversion The highest fuel costs in the world are in Norway, which is unusual since it is a major producer of oil. If $1 = 6.03950 kr (Norwegian Krone), and fuel costs in Norway are typically listed as 15.37 kr/L, what is the cost in $/gal? > **Calculation Box:** #### 6. Units of Heat Capacity The units of heat capacity are __________. - A) KJ or °C/J - B) J/K or J/°C - C) J/g-K or J/g-°C - D) J/mol - E) g-KJ or g-°C/J #### 7. British Thermal Unit (Btu) Conversion The British thermal unit (Btu) is commonly used in engineering applications. A Btu is defined as the amount of heat required to raise the temperature of 1 lb of water by 1°F. There are __________ joules in one Btu. 1 lb = 453.59 g; °C = (5/9)(°F - 32); Specific heat of H2O (l) = 4.184 J/g-K. - A) 3415 - B) 60.29 - C) 1054 - D) 5.120 x 10^-3 - E) Additional information is needed to complete the calculation. #### 8. Significant Figures How many significant figures are there in each of the following measurements? Place your answer in the box provided! 1. **1.0030 cm** 2. **0.00002471 kg** 3. **10,000 yrs** 4. **65,229 min** 5. **32.90090 m** 6. **2.900000 mm** > **Significant Figures Box:** #### 9. Rounding to Significant Figures Round each of the following to three significant figures. - 707.5 __________ - 2,300.2 __________ - 0.0003350 __________ - 10.26730 __________ #### 10. Scientific Notation Conversion Convert each of the following into correct scientific notation. 10A) 1747 __________ 10B) 0.00000984 __________ --- This section helps students
Transcribed Image Text:--- ### Educational Exercise: Fuels, Heat Capacity, and Significant Figures #### 5. Fuel Costs Conversion The highest fuel costs in the world are in Norway, which is unusual since it is a major producer of oil. If $1 = 6.03950 kr (Norwegian Krone), and fuel costs in Norway are typically listed as 15.37 kr/L, what is the cost in $/gal? > **Calculation Box:** #### 6. Units of Heat Capacity The units of heat capacity are __________. - A) KJ or °C/J - B) J/K or J/°C - C) J/g-K or J/g-°C - D) J/mol - E) g-KJ or g-°C/J #### 7. British Thermal Unit (Btu) Conversion The British thermal unit (Btu) is commonly used in engineering applications. A Btu is defined as the amount of heat required to raise the temperature of 1 lb of water by 1°F. There are __________ joules in one Btu. 1 lb = 453.59 g; °C = (5/9)(°F - 32); Specific heat of H2O (l) = 4.184 J/g-K. - A) 3415 - B) 60.29 - C) 1054 - D) 5.120 x 10^-3 - E) Additional information is needed to complete the calculation. #### 8. Significant Figures How many significant figures are there in each of the following measurements? Place your answer in the box provided! 1. **1.0030 cm** 2. **0.00002471 kg** 3. **10,000 yrs** 4. **65,229 min** 5. **32.90090 m** 6. **2.900000 mm** > **Significant Figures Box:** #### 9. Rounding to Significant Figures Round each of the following to three significant figures. - 707.5 __________ - 2,300.2 __________ - 0.0003350 __________ - 10.26730 __________ #### 10. Scientific Notation Conversion Convert each of the following into correct scientific notation. 10A) 1747 __________ 10B) 0.00000984 __________ --- This section helps students
**Question 4A:** A new penny has a mass of 2.49 g and a volume of 0.349 cm³. Is the penny pure copper? *Explanation:* To determine if the penny is made of pure copper, you need to calculate its density and compare it to the known density of pure copper. The formula for density is: \[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \] Given: - Mass of the penny = 2.49 g - Volume of the penny = 0.349 cm³ Using the formula: \[ \text{Density of the penny} = \frac{2.49 \, \text{g}}{0.349 \, \text{cm}^3} \] Calculate the density and compare it to the density of pure copper (which is 8.96 g/cm³) to determine if the penny is made of pure copper.
Transcribed Image Text:**Question 4A:** A new penny has a mass of 2.49 g and a volume of 0.349 cm³. Is the penny pure copper? *Explanation:* To determine if the penny is made of pure copper, you need to calculate its density and compare it to the known density of pure copper. The formula for density is: \[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \] Given: - Mass of the penny = 2.49 g - Volume of the penny = 0.349 cm³ Using the formula: \[ \text{Density of the penny} = \frac{2.49 \, \text{g}}{0.349 \, \text{cm}^3} \] Calculate the density and compare it to the density of pure copper (which is 8.96 g/cm³) to determine if the penny is made of pure copper.
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Measurement
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS