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How many moles of atoms are in each elemental sample?(a)

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 20P Chapter 6

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 20P

How many moles of atoms are in each elemental sample?

(a) 4.6 × 1024 Pb atoms

(b) 2.87 × 1022 He atoms

(c) 7.91 × 1023 K atoms

(d) 4.41 × 1021 Ca atoms

Step-by-Step Solution:

Solution 20P

Here, we are going to calculate the number of moles of atoms in each of the given elemental sample.

Step 1:

One mole of any species is that quantity in number having a mass equal to its atomic or molecular mass in grams.

The number of particles (atoms, molecules or ions) present in 1 mole of any substance is fixed, with a value of 6.022 × 1023. This is an experimentally obtained value. This number is called the Avogadro Constant or Avogadro Number.

Step 2 of 2

Chapter 6, Problem 20P is Solved
Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

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How many moles of atoms are in each elemental sample?(a)

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