Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 1 - Chemical Foundations - Exercises: 52

Answer

Time taken by car = 1.07 hours = 1 hour 4.2 min = 64.2 min Gasoline consumed = 2.49 gallons

Work Step by Step

1 mi/hr = 1.61 km/hr Thus 65 mi/hr = 104.65 km/hr Since speed = $\frac{Distance}{Time}$, Thus Time = $\frac{Distance}{Speed}$, $\frac{Distance}{Speed}$ = $\frac{112}{104.65}$ = 1.07 hours Time = 1.07 hours = 64.2 minutes. For gasoline, 1 mile= 1.61 km Thus, 28 miles = 45.08 km. Thus, 45.08 km takes up one gallon of gasoline. Thus 112 km will take 2.48447 $\approx$ 2.49 gallons of gasoline.
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