Question

5. How many moles are equal to 2.4 x 1023 formula units of sodium chloride?

Answer 1

The answer is 0.4 moles

Step-by-step explanation:

To find the number of moles in a substance given it's number of entities we use the formula

`n = (N)/(L) \\`

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

`n = \frac{2.4 * {10}^(23) }{6.02 * {10}^(23) } = (2.4)/(6.02) \\ = 0.398671096....`

We have the final answer as

0.4 moles

Hope this helps you