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

User Weng
by
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1 Answer

5 votes

Answer:

0.048 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{2.91 * {10}^(22) }{6.02 * {10}^(23) } \\ = 0.048338...

We have the final answer as

0.048 moles

Hope this helps you

User Miroslav Trninic
by
8.5k points

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