Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 21 - Problems: 21.79

Answer

See explanation below.

Work Step by Step

Steel bridge-supports rust at the waterline but not above or below it because at the waterline there are large concentrations of water and oxygen, which causes rust formation. Above it there is no water, below it there won’t be large oxygen.
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