The given table should be completed. Mass of sample Moles of sample Atoms in sample 5.00 g Al 0.00250 mol Fe 2.6 × 10 24 atoms Cu 0.00250 g Mg 2.7 × 10 − 3 mol Na 1.00 × 10 4 atoms U Concept Introduction: Number of moles is related to mass and molar mass as follows: n = m M Here, m is mass and M is molar mass. According to Avogadro’s law, 1 mole of a substance contains 6.023 × 10 23 atoms. This is known as Avogadro’s number and denoted by symbol N A . Thus, number of molecules can be calculated from number of moles using the following conversion factor: ( 6.023 × 10 23 molecules 1 mol ) .

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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781337399425
BuyFind

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781337399425

Solutions

Chapter 8, Problem 84AP
Interpretation Introduction

Interpretation:

The given table should be completed.

Mass of sample Moles of sample Atoms in sample
5.00 g Al
0.00250 mol Fe
2.6×1024 atoms Cu
0.00250 g Mg
2.7×103 mol Na
1.00×104 atoms U

Concept Introduction:

Number of moles is related to mass and molar mass as follows:

n=mM

Here, m is mass and M is molar mass.

According to Avogadro’s law, 1 mole of a substance contains6.023×1023 atoms. This is known as Avogadro’s number and denoted by symbolNA.

Thus, number of molecules can be calculated from number of moles using the following conversion factor:

(6.023×1023 molecules1 mol).

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