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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro
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A salt crystal has a mass of 0.12 mg. How many NaCl formula units does it contain?

Chapter 6, Problem 56P

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QUESTION:

A salt crystal has a mass of 0.12 mg. How many NaCl formula units does it contain?

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QUESTION:

A salt crystal has a mass of 0.12 mg. How many NaCl formula units does it contain?

ANSWER:

Solution 56P

Here, we are going to calculate the number of NaCl formula units present in a salt crystal of mass 0.12 mg.

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.

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