Practice with a sample problem You wash dishes for a chemistry laboratory to make extra money for laundry. You earn 12 dollars/hour, and each shift lasts 75 minutes, Your laundry requires 12 quartern/load, • Part A How many shifts must you work if you wish to wash 10 loads of laundry? Express your answer numerically as an integer. • View Available Hint(s) shifts

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...
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For example, dimensional analysis could be used to determine the number of nickels in 3432.35 dollars.
• To begin, write down the starting value, 3432.35 dollars. This can also be written as a fraction: nn delarn
• Next, convert dollars to cents. This conversion involves a simple conversion factor: . Note that the "dollar" unit should appear on the bottom of this conversion
I dellar
factor, since "dollars" appears on the top of the starting value.
• Finally, convert cents to nickels. This conversion also involves a simple conversion factor. . This time "cents" should be on the bottom of the conversion factor,
S ceta
since it was on top of the previous conversion factor.
• Combining these expressions gives us
3432.35 dollars
1 nickel
5 centa
100 cents
I dollar
• Finally, cancel units. Since dollars are divided by dollars, and cents are divided by cents, both of these units can be canceled. Multiplying through gives the final result:
100 cents
1 dottar
3432.35 dollars
1 nickel
5 centa
68, 647 nickels
• To complete the calulation, multiply everything in the numerator and divide by everything in the denominator (or top and bottom, respectively).
Practice with a sample problem
You wash dishes for a chemistry laboratory to make extra money for laundry. You earn 12 dollars/hour, and each shift lasts 75 minutes. Your laundry requires 12
quarters/load.
Part A
How many shifts must you work if you wish to wash 10 loads of laundry?
Express your answer numerically as an integer.
> View Available Hint(s)
shifts
Transcribed Image Text:For example, dimensional analysis could be used to determine the number of nickels in 3432.35 dollars. • To begin, write down the starting value, 3432.35 dollars. This can also be written as a fraction: nn delarn • Next, convert dollars to cents. This conversion involves a simple conversion factor: . Note that the "dollar" unit should appear on the bottom of this conversion I dellar factor, since "dollars" appears on the top of the starting value. • Finally, convert cents to nickels. This conversion also involves a simple conversion factor. . This time "cents" should be on the bottom of the conversion factor, S ceta since it was on top of the previous conversion factor. • Combining these expressions gives us 3432.35 dollars 1 nickel 5 centa 100 cents I dollar • Finally, cancel units. Since dollars are divided by dollars, and cents are divided by cents, both of these units can be canceled. Multiplying through gives the final result: 100 cents 1 dottar 3432.35 dollars 1 nickel 5 centa 68, 647 nickels • To complete the calulation, multiply everything in the numerator and divide by everything in the denominator (or top and bottom, respectively). Practice with a sample problem You wash dishes for a chemistry laboratory to make extra money for laundry. You earn 12 dollars/hour, and each shift lasts 75 minutes. Your laundry requires 12 quarters/load. Part A How many shifts must you work if you wish to wash 10 loads of laundry? Express your answer numerically as an integer. > View Available Hint(s) shifts
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