Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 6 - Chemical Composition - Exercises - Problems - Page 198: 46


He has the greatest number of atoms.

Work Step by Step

1 mole = $6.022 \times 10^{23}$ atoms Number of mole = $\frac{mass}{molar mass} $ a) Number of mole = $\frac{10g}{4g/mol} = 2.5$ mole of He b) Number of mole = $\frac{25g}{20g/mol} = 1.25$ mole of Ne c) Number of mole = $\frac{115g}{131g/mol} = 0.114$ mole of Xe He has the greatest number of moles, therefore, it has the greatest number of atoms as well.
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