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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 10, Problem 24E
Textbook Problem
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Your monthly electric bill is $54 at a rate of 12 cents per kilowatt-hour. How many kilowatt- hours of electricity did you use? How many joules? (Use the tables in Chapter 9.)

Interpretation Introduction

Interpretation:

The electrical energy spent in kilowatt-hours and Joules is to be determined.

Concept Introduction:

If the cost of one unit of energy and the monthly cost are known, then the energy spent per month can be calculated by dividing the monthly cost by the cost of one unit of energy.

Explanation of Solution

The relation between cent and dollar is given as:

1 cent = $0.01 

Now, use the above relation to convert 12 cent to dollars as follows:

12 cent =(12 cent×$0.011 cent)= $0.12

Thus, 1 kilowatt-hour electric energy costs  $0.12.

The monthly electric bill in kilowatt hours is calculated as follows:

Electrical energy used per month=($54×1 kilowatt-hour $0.12)=4

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Chemistry In Focus
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