Answer
The correct answer is (c)
Work Step by Step
According to the equation, each $O_2$ molecule reacts with 4 Na atoms. So, 12 Na atoms are required to react with 3 $O_2$ molecules. So, the correct answer is (c).
Chemistry: Molecular Approach (4th Edition)
by Tro, Nivaldo J.
Published by
Pearson
ISBN 10:
0134112830
ISBN 13:
978-0-13411-283-1
Chapter 4 - Section 4.2 - Reaction Stoichiometry: How Much Carbon Dioxide? - Conceptual Connection - Page 144: 4.1
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