1 Answer

Taekni · Answer 1 · 2022-03-06T10:16:45+0000

Answer:

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

We have

$n = \frac{2.4 {10}^(23) }{6.02 * {10}^(23) } = (2.4)/(6.02) \\ = 0.3986...$

We have the final answer as

Hope this helps you