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# Your monthly electric bill is $245 at a rate of 15 cents per kilowatt-hour. How many kilowatt-hours of electricity did you use? How many joules? BuyFindarrow_forward ### Chemistry In Focus 7th Edition Tro + 1 other Publisher: Cengage Learning, ISBN: 9781337399692 #### Solutions Chapter Section BuyFindarrow_forward ### Chemistry In Focus 7th Edition Tro + 1 other Publisher: Cengage Learning, ISBN: 9781337399692 Chapter 10, Problem 25E Textbook Problem 8 views ## Your monthly electric bill is$245 at a rate of 15 cents per kilowatt-hour. How many kilowatt-hours of electricity did you use? How many joules?

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

Given information:

The monthly electric bill is $245 at a rate of 15 cents per kilowatt-hours. The relation between cent and dollar is given as: 1 cent =$0.01

Now, use the above relation to convert 15 cents to dollars as follows:

15 cent =(15 cent×$0.011 cent)=$0.15

Thus, 1 kilowatt-hour electrical energy costs  $0.15. The monthly electric bill in kilowatt-hours is calculated as follows: Electrical energy used per month=($245×1 kilowatt-hour \$0

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