Answer
The bubbles come from CO$_2$ escaping from the pressurized bottle.
Work Step by Step
When soda is made, CO$_2$ is forced under high pressure to dissolve into the liquid. When the bottle is opened, pressure is released, producing the fizz.
Introductory Chemistry (5th Edition)
by Tro, Nivaldo J.
Published by
Pearson
ISBN 10:
032191029X
ISBN 13:
978-0-32191-029-5
Chapter 1 - The Chemical World - Exercises - Questions - Page 10: 1
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