1 Answer

Bartosz Zasada · Answer 1 · 2021-12-28T23:59:35+0000

Answer:

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

Hope this helps you

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