How many moles are in 2.91 x 10^22 molecules of Helium?

Question

asked Dec 2, 2021 33.2k views

1 Answer

Miroslav Trninic · Answer 1 · 2021-12-09T02:30:17+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

$n = \frac{2.91 * {10}^(22) }{6.02 * {10}^(23) } \\ = 0.048338...$

We have the final answer as

Hope this helps you