Chemistry 9th Edition

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

Chapter 1 - Chemical Foundations - Exercises - Page 37: 78


5.0 x10³ cm

Work Step by Step

V=πr²(length) Length= V/πr² Volume of the copper wire: 22g x (1 cm³/ 8.96g)= 2.45536 cm³ (two sig figs) Radius of the copper wire: Diameter= 0.25 mm *We need to get the radius into centimeters to cancel out the units at the end* 0.25 mm/2= 0.125 mm 0.125 mm/10= 0.0125 cm Plug into formula: 2.45536 cm³/π(0.0125cm)² 2.45536 cm³/π(0.00015625cm²) 2.45536 cm³/0.0004908738521cm²= 5002.02 cm *cm³/cm² reduce to cm With six figs 5.0 x10³ cm
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