Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 17 - Phases and Phase Changes - Problems and Conceptual Exercises - Page 603: 1

Answer

(a) equal to (b) less than

Work Step by Step

(a) The number of molecules in one mole of any substance is known as Avogadro's number, which is a constant number that is $6.023 \times 10^{23}$. Thus, one mole of both $N_2$ and $O_2$ has an equal number of molecules. (b) We know that molecular mass of every substance is different. The molecular mass of $N_2=14$ is less than that of $O_2=16$.
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