1 Answer

Santanu Dey · Answer 1 · 2022-12-20T13:15:21+0000

Answer:

0.64 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

$n = \frac{3.86 * {10}^(23) }{6.02 * {10}^(23) } = (3.86)/(6.02) \\ = 0.641196...$

We have the final answer as

Hope this helps you