Question

3. How many moles are in 1.49 x 1023 molecules of iodine?

Answer 1

The answer is 0.25 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{1.49 * {10}^(23) }{6.02 * {10}^(23) } = (1.49)/(6.02) \\ = 0.247508305...`

We have the final answer as

0.25 moles

Hope this helps you