Answer
a) physical
b) chemical
Work Step by Step
a) changes the appearance of the metal but not the composition - physical
b) flammability/burning is a chemical change as a new substance will be formed
Introductory Chemistry (5th Edition)
by Tro, Nivaldo J.
Published by
Pearson
ISBN 10:
032191029X
ISBN 13:
978-0-32191-029-5
Chapter 3 - Matter and Energy - Exercises - Problems - Page 88: 43
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